IMAGE  EVALUATION 
TEST  TARGET  (MT-3) 


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Photographic 

Sciences 
Corporation 


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CIHM/ICMH 

Microfiche 

Series. 


CIHM/ICMH 
Collection  de 
microfiches. 


Canadian  Institute  for  Historical  Microreproductions  /  institut  canadien  de  microreproductions  historiques 


Technical  and  Bibliographic  Notes/Notes  techniques  et  bibliographiques 


The  Institute  has  attempted  to  obtain  the  best 
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L'Institut  a  microfilmd  le  meilleur  exemplaire 
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une  image  reproduite,  ou  qui  peuvent  exiger  une 
modification  dans  la  m6thode  normale  de  filmage 
sont  indiqu6s  ci-dessous. 


D 
D 
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n 

D 
D 
D 
0 


Coloured  covers/ 
Couverture  de  couleur 

Covers  dariaged/ 
Couverture  endommagee 

Covers  restored  and/or  laminated/ 
Couverture  restaur6e  et/ou  pellicul^e 

Cover  title  missing/ 

Le  titre  de  couverture  manque 

Coloured  maps/ 

Cartes  g^ographiques  en  couleur 

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Encre  de  couleur  (i.e.  autre  que  bleue  ou  noire) 

Coloured  plates  and/or  illustrations/ 
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Bound  with  other  material/ 
Relie  avec  d'autres  documents 


□    Coloured  pages/ 
Pages  de  couleur 

I      I    Pages  damaged/ 


D 
0 


Pages  endommag^es 


Pages  restored  and/or  laminated/ 
Pages  restaur^es  et/ou  pelliculees 

Pages  discoloured,  stained  or  foxed/ 
Pages  d^color^es,  tachet^es  ou  piqu^es 


I      I    Pages  detached/ 


Pages  detachees 

Showthrough/ 
Transparence 

Quality  of  prir 

Qualite  inegale  de  I'impression 

Includes  supplementary  materic 
Comprend  du  materiel  supplementaire 


I      1    Showthrough/ 

I      I    Quality  of  print  varies/ 

I      I    Includes  supplementary  material/ 


D 


D 


Tight  binding  may  cause  shadows  or  distortion 
along  interior  margin/ 

La  reliure  serree  pout  causer  de  I'ombre  ou  de  la 
distortion  le  long  de  la  marge  int6rieure 

Blank  leaves  added  during  restoration  may 
appear  within  the  text.  Whenever  possible,  these 
have  been  omitted  from  filming/ 
II  se  peut  que  certaines  pages  blanches  ajoutdes 
lors  dune  restauration  apparaissent  dans  le  texte, 
mais,  lorsque  cela  dtait  possible,  ces  pages  n'ont 
pas  ete  filmees. 


D 


Only  edition  available/ 
Seule  Edition  disponible 

Pages  wholly  or  partially  obscured  by  errata 
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obscurcies  par  un  feuillet  d'errata,  une  pelure, 
etc.,  ont  ^t^  filmdes  d  nouveau  de  facon  a 
obtenir  la  meilleure  image  possible. 


D 


Additional  comments:/ 
Commentaires  supplementaires; 


This  item  is  filmed  at  the  reduction  ratio  checked  below/ 

Ce  document  est  film6  au  taux  de  reduction  indiqu^  ci-dessous. 


10X 

14X 

18X 

22X 

26X 

30X 

y 

12X 


16X 


20X 


24X 


28X 


32X 


tails 
;  du 
odifier 
une 
mage 


The  copy  filmed  here  has  been  reproduc<*d  thanks 
to  the  generosity  of: 

University  of  British  Columbia  Library 


The  images  appearing  here  are  the  best  quality 
possible  considering  the  condition  and  legibility 
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filming  contract  specifications. 


Original  copies  in  printed  paper  covers  are  filmed 
beginning  with  the  front  cover  and  ending  on 
the  last  page  with  a  printed  or  illustrated  impres- 
sion, or  the  back  cover  when  appropriate.  All 
other  original  copies  are  filmed  beginning  on  the 
first  page  with  a  printed  or  illustrated  impres- 
sion, and  ending  on  the  last  page  with  a  printed 
or  illustrated  impression. 


The  last  recorded  frame  on  each  microfiche 
shall  contain  the  symbol  -^  (meaning  "CON- 
TINUED"), or  the  symbol  V  (meaning  "END"), 
whichever  applies. 


L'exemplaire  film6  fut  reproduit  grdce  d  la 
g6ndrosit6  de: 

University  of  British  Columbia  Library 


Les  images  suivantes  ont  6x6  reproduites  avec  le 
plus  grand  soin,  compte  tenu  de  la  condition  et 
de  la  nettet6  de  l'exemplaire  film6,  et  en 
conformity  avec  les  conditions  du  contrat  de 
filmage. 

Les  exemplaires  originaux  dont  la  couverture  en 
papier  est  imprim^e  sent  filmds  en  commengant 
par  le  premier  plat  et  en  terminant  soit  par  la 
dernidre  page  qui  comporte  une  empreinte 
d'impression  ou  d'lllustration.  soit  par  le  second 
plat,  selon  le  cas.  Tous  les  autres  exemplaires 
originaux  sont  filmds  en  commenqant  par  la 
premidre  page  qui  comporte  une  empreinte 
d'impression  ou  d'illustration  et  en  terminant  par 
la  dernidre  page  qui  comporte  une  telle 
empreinte. 

Un  des  symboles  suivants  apparaitra  sur  la 
dernidre  image  de  chaque  microfiche,  selon  le 
cas:  le  symbole  — »■  signifie  "A  SUIVRE",  le 
symbols  V  signifie  "FIN". 


Maps,  plates,  charts,  etc.,  may  be  filmed  at 
different  reduction  ratios.  Those  too  large  to  be 
entirely  included  in  one  exposure  are  filmed 
beginning  in  the  upper  left  hand  corner,  left  to 
right  and  top  to  bottom,  as  many  frames  as 
required.  The  following  diagrams  illustrate  the 
method: 


Les  cartes,  planches,  tableaux,  etc.,  peuvent  dtre 
filmds  d  des  taux  de  reduction  diftdrents. 
Lorsque  le  document  est  trop  grand  pour  dtre 
reproduit  en  un  seul  clichd,  il  est  filmd  6  partir 
de  Tangle  supdrieur  gauche,  de  gauche  6  rlroite, 
et  de  haut  en  bas,  en  prenant  le  nombre 
d'images  ndcessaire.  Les  diagrammes  suivants 
illustrent  la  mdthode. 


srrata 
to 


pelure, 
in  ci 


n 


32X 


1 

2 

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1 

2 

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3 

4 

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6 

Jr 


r.'» 


I 


EEV[si()X   OF  tup:    i)i:i:p-\vatf;u    mollisca   of    iii 

ATLANTir     COAS'r     OF     NOKTIl     AMI^IMOA.     Wmi      Dl 
SCKIPTIONS   OF   NFW  (iENFliA  AND    SPFCIlvS. 

PAirr  I.— IHVAIA'IA. 


IJy  xVddtson  K.  Veiuull, 

rro/i  Hsor  III'  /oiiloiiii  ill    Villi:  I'lurei-fiUij 

IvA'iiiAiuNE  J.  Brsn, 

Jfisiyliiiil  ill  I'lahiidji  Museum  of  Yale  riiircrsit!/. 


1 


•  Sr* 


Tins  article  is  not  intended  as  a  review  of  all  tlio  known  species 
found  off  our  coasts.  It  is  ])reliiniiniry  to  a  much  more  extensive 
rei)ort,  in  which  full  details  of  the  distrihution  of  all  the  species  col- 
lected will  be  j>iven,  and  for  which  the  detailed  tables  have  been  pre- 
pared, givinji'  every  station  for  each  species,  with  its  i)osition.  depth, 
temperature,  character  of  the  bottom,  etc. 

Many  of  the  larger  and  more  i)n)minent  species  were  described  and 
figured  by  the  senior  author  several  years  ago  in  various  i)apers  pub- 
lished in  the  Transactions  of  the  Connecticut  Academy  and  elsewhere. 
The  snmller  and  more  dillicult  species  weie  put  aside  at  that  time,  for 
more  careful  study,  and  are  now  presented. 

The  families  that  are  most  fully  treated  in  this  article  are  the  Ledidie, 
Cuspidarida',  Diplodontid.e,  anil  I'ectinida-.  Tiiese  include  a  very- 
large  number  of  deep-sea  species  in  every  region,  and  their  species  are 
often  very  dillicult  to  distinguish  witiiout  long  and  patient  microscopic 
study  anil  <lirect  comparison  of  large  series  of  specimens  from  various 
localities. 

The  present  article  is  intended  to  give  some  of  the  results  of  studies 
of  this  kind,  made  during  several  years,  of  the  large  series  of  si  i- 
mens  dredged  by  the  Tnited  States  I'ish  Commission  oil"  our  coasts 
from  1871  to  18S7,  together  with  those  previously  dredged  by  the  senior 
author  in  the  same  region. 


Proceedings  U.  S.  National  IVIuseuMj  Vol.  XX— No.  1139. 


^[mf,\iv>^'.  i!*>i.i  ii+«j,fRitfjH[ 


77(i 


i'i;(tci:i:i)i.\(is  nr  riii:  smioxal  mi  si:i  \i. 


Vi'l..  x\. 


In  ordci'  to  itvoid.  so  t;ir  as  possihlc.  tlic  iiiMMMtaiiily  iicccssaiily 
i'oiincctcd  wirli  humc  ('csciiittioiis  ot'  tlirsc  foiins.  we  liaxc  had  laruc 
caiiici'a  Iiicida  lij;iiit's  made  as  ('art'l'iilly  as  possililc.  not  onl.N  ot  flu' 
now  s]>i'('i('s.  bnt  also  ol  sonic  nl'  thosr  i»ic\  ionsly  dt'sciilnMl  tioni  our 
coast,  for  conipai'isitn.  Il  is.  t  iit'it'to!  c.  to  l)t'  hoped  tlial  t'litiirc  invcsti 
yalors  nniy  at  least  l)e  al)h'  to  nndcistand  t  lie  charartcrs  ol'  t  lit'  s|ircirs 
now  I't'founi/t'd  1)_\'  us.  wlHthcr  they  au'it'c  with  ouf  dctcrininations  or 
not. 

Althonji'li  the  collections  studitMJ  arc  uiiiisiiall\  c\tcnsi\c,  and  the 
iiniidx'i' ot  stations  rcpi'cscntcd  is  very  lai',i:c.  it  is  not<'W(irthy  ilia!  a 
coiisidcrabli'  imnilicr  of  species  were  met  with  Imt  once,  and  soinetimes 
only  a  siii<;ic  specimen  w  as  dhtained.  This  indicates  that  many  addi- 
tional species  ot"  such  small  d-ep  sea  shells  would  be  discovered  in  the 
same  reuiou  if  additional  di-edj:iii;L;s  should  be  made. 

()ur  in\esti,nations  have  enabled  lis  to  add  to  the  fauna  nine  .genera, 
four  subucneia.  and  aliont  eiuht\'  sjiecics  and  \ai  ieties.  ol'  which  about 
se\'ciit,\  aie  described  as  new  species  and  se\tMi  as  new"  \arietics:  of 
these,  twtd\e  species  and  one  \aiiety  behHi<i'  to  the  soiitliein  fauna. 

The  followiiij^'  list  shows  the  .^cneia  in  which  the  new  species  and 
varieties  aic  included.'     The  new   <;tMiera  are  printed  in  italic: 


Mttrh  sii  11(1,  1. 
Al>r;i.  \  nr.  1 . 
M;i((ini;i.   1 
Moiitiniit.i.  I.  v;ir.  '2. 

h  I  llnijixis. 

(  rv]iiinl(iii.  I,  \.ir.  1. 
.I.i'iiiiilii'<,  i>. 
Axiiioiisis.  1.  v;n  .  1. 
.1.1  i iiiiiiini ,  1. 
L( lild.i  iinix,   1. 
l"iis]iiiiaiia,  S. 
(  Mriliomya.  1.'. 
llnl(inyiM]iliii,  1. 
.M\i)uor;i,  li. 


roniinx  M.  var.  1. 
( 'i'tii''<i  iclia.  L'. 
( 'I'lDins  a,  1 . 
I.ydiisirlla.  -. 

l.>  01i>i,",     1. 

(ii(li(iji!i<iia,  1. 
KciiniTiia.  1. 
i'lTiiddiiia.  1. 
I.imatii'a,  I!. 
('hi.i!ii,\  s.  1'. 
1 1\  a  l(i]u'ctrn.  1. 
('inii|ii(>iM'cr('s.  1. 
C,\  •-■loptTtt'li.  '2. 


Ilalhyaiia.  '2. 
Ill  nihil  red. 
I.iiniiji>i>.  2. 
Solciiiva,   1, 
Xili'iiia.   1,  \  ar.   1 . 
I.t.la.   1. 

I.cil.'lia.   1,  var.  1. 
Adruui  lilt.  1 . 
Mici'iiyoMia. 
VdMiflla,  11.  \ar. 
Mallctia.  2. 
Xi'ildiiflla,  1. 
'riiularia.  W. 


No  attempt  lias  been  made  to  jiive  the  coiMi)lete  synonymy  and 
details  of  the  distribution.  iSuch  matters  have  been  leserved  Ibr  the 
final  report  on  the  collections. 

I'liless  t»therwise  stated,  the  station  numbers  are  those  of  the 
I'nited  States  I'Msh  ('ommissioi.  and  tli(>  serial  numiicrs  are  those  of 
the  I'liited  States  Xational  Museum. 

The  drawiui^s.  with  few  exeepti  >ns.  were  made  by  ;\Ir.  Alpheus  II. 
^'errill.  under  the  iiuuiediate  supervision  of  the  authors. 

I'luhoilii  Miinciim  (if  Yiilf  I'liii  cmilij,  .Siw  lliinti,  Coini'  cliciil.  •Iiniuiiry  2.'>,  180^. 


'Owiiig  to  tlio  loiiy  (l('la\  ill  tlic  iHiIil'calioii  of  this  article,  sonic  of  the  iicw 
sjjccics  and  ueiicra  liavc  been  imlilished  elsewhere,  so  that  these  immhers  are  not 
now  strict Iv  correcl. 


S 


i 


muf 


NO.  u:i!i. 


ItlJA'-WMEU  .]J(iLI.l  sc  l—l  lilU.ll.L  AM'  III  ^n. 


I  I  I 


F;iu)il.v   rilOLADlh.i:. 
MARTESIELLA,  now  s-ubgenus. 

Tliis  sul);jft'iuM'ii'  iiaiiu'  is  iHoitoscd  lor  tlif  t'oUowiiiij,'  siiccics.  wliicli 
(litTcis  from  Marttsid  in  liavini;' ;i  well  dctiiicd.  clon^attMl.  incilinii.  dorsal 
|diit«'.  posti'i'ior  to  the  uiid)os.  in  nddilioii  to  tlic  sliii'M-sliapi'd  one  oxci' 
tlii'iii. 

MARTESIA   .MARTESIELLA)   FRAGILIS.  new  species. 

.  riat."  l.WIX.  liu.  1(». 

Shell  small,  white,  thin,  tVa,uile.  wedj^e  shaiicd.  'I'lic  antei  iof  end  is 
very  short  and  broadly  rounded,  the  apertnre  iifarly  closed  in  onr 
lar.iiest  specimen  l»y  a  pair  of  e;dloiis  plates.  The  anteio  dorsid  nmriiin  is 
reenrved  toward  the  und)os.  l)nt  imt  appresscd.  ;iimI  forms  ;i  deep,  spii  ;il. 
ojien  ca\ity.  The  v;d\es  h;i\e  :i  very  ol)tnse  iinterioi'  cnniruimit  inn. 
A  tuoad  and  moderately  deep  sulcus  runs  from  the  beak  to  the  Ncntral 
nmr-in;  in  front  of  this  the  surfac*' is  covered  by  thin  concentric  ribs, 
which  cni've  downwaMl  at  the  sulcus  and  form  a  distinct  an.ule  in  line 
with  the  anterior  emnrfiination  ami  c()rres])t)ndiu,u'  with  a  sliuht  ridm' 
on  the  surface:  these  coin-en  trie  ril»s  are  crossed  by  tine  radiat  in>i-  lines, 
which  jn'oduee  fine  >ci  rations  on  their  ed.u'es.  l*osteri(U' to  the  sulcus 
the  surface  is  maiked  oiil\  by  ii-reji'ular  lines  of  jirowth.  whi(di.  near  it, 
take  the  form  of  m>i  c  distinct  yroo\-cs  or  rid.u'cs.  The  posterior  end  is 
proloniLied.  compres-cd.  ai:d  l)liintlv  rounded.  The  umbonal  plate  is 
thick.  relati\-el  -  lai  ,ue.  and  iisiiall.\  heai  t  shaped.  \\  ith  I  he  posicrioi'  end 
broader  and  di>tiiicil\'  caiar^inate  in  the  middle:  the  ;iiiIciior  eml 
tai)ers  somewhat  and  is  Itlnnt  ;iiid  an,i:iilatcd.  or  siuuetimes  subacute. 
The  p'isterier  dorsal  i)late  is  lon.u'.  inirrow.  and  smm'wiiat  spatiilateor 
clavate.  and  stands  well  in  relief  above  the  doi>;il  nnr  uin.  with  tlic 
ed,m's  free  and  the  narrow  anteritu'  (uul  runnin-  under  the  posterioi' 
end  of  the  \iinboiml  plate. 

Leiiiith  of  o!ie  of  the  larizost  specimens.  7  mm.:  hei-ht.  \.'>  mm..- 
thickness.  4  mm. 

Young  speeiinens  .">  or  1  mm.  in  len.yth  are  relatively  shorter  ami 
thieki'r  than  the  larji'er  ones,  but  even  tlu'.se  have  the  anterior  callous 
pretty  well  develoi)ed;  the  umbonal  plate  is  usually  shield  shapeil, 
the  lateral  borders  einarjiiimte,  in  contact  with  the  most  prtunincni 
part  of  the  umbos:  the  posterior  border  is  distinctly  emarjjjinate.  ami 
the  anterior  end  has  a  central  point  or  mucro.  sometimes  delined  liy 
slightly  concave  posterior  ed.ucs. 

Many  live  s])ecimens  were  tbuiid  in  a  pieci^  of  wood  tloaliiii;  near 
station  2o()<l,  N.  hit.  ;i7    S.V,  W.  lony.  tis>  S',  18,S."). 


■J 

y 

7TS 


/•/;"' 7;/;/)/.\v,.s'  of  nii:  .v.r/vo.v.i/.  .][rsi:r.)f. 
Faiiiilv  SKMl'LlD.i:. 


vol..  XX. 


ABRA  LONGICALLIS  i  Scacchi),  variety  AMERICAN  A.  new. 
.  I'lali'  l.XXXIIl,  li^^'^.  li.  T.I 
.Ihn,  h>ii<yi,iiUis  Vi  ititii.i.,    I'i:ms.  Coim.  A.aa.,  \  1.  pp.  L"-'l.  -'TS.  I'^.^l. 
Our  spcciiiH'iis  (lifter  I'miii  llir  Iliirup.Mii   form  dc^ciibcd  and  li,uunMl 
1)V  C.  O.  Sais'  ill  liaviiij--  llu'  pc.stniur  lateral  toolii  le.ss  I'eiiiote  and  the 
eartila.u-e  i'i<    <»''  <'li(>iidi'«M>l'">'*'  l<>ii,^«''N  tli<'  aiiten.-dorsal  iiiar-iii   more 
convex,  and  ihe  wliole  shell  relati\el\  hroader. 

A  very  few  .specimens  were  ol»taiiied  at  six  stations  Ix'tween  N.  lat. 
'.Vr  !!»',  W.  lonji-.  <1S"  L'S'  'M'\  and  N.  lat.  ;3«»  l(i'  .W)",  W.  lony.  »;s  21  .  in 
i>24  to  LV>-'<>  fathoms,  iss.j-issti. 

Family  TIOLLINID.K. 

MACOMA   INFLATA  Dawson. 
H'liit.'s  l.XW  II.  liu.  I:   I.XXXVllI.  li,--.  tl.) 
MucuHH    iiijh'l':    .STixH'x.N    MSS       D.vw^os.   (•..n;i.li;.n    Xiit  iinilisf ,    \1.   ]>.   :■". 

ISTl.'.— \  1   Kltll,!,,  ■!'i;ili'~.  ('(Mill.     \r;i(l..    \   ,   Ji.  .">I'.S.    ISSJ. 

A   iiuiiiluT  of  live  speeimeiis  and   separate  valves  were  ol)tained  at 
.six  stations  between  N.  lat.  17     1(1'.  W.  loiif-.  17    ;i.V  ;5()".  and  N.  lat.  Id 
;'.'.  \V.  lon<;-.  70    •'•l'.  in  ^u   to  iMM;  fatlioins.  lS77-lS,st).     Miirn.v  Uay.— 
Dawson.     (Inlf  of  St.  Lawrence.— Coll.  Whiteavos. 

Family   FKTKlCO.l-lD.F. 

CHORISTODON  ?  CANCELLATUS  Verrill. 

,  riiitf  xc\i.  li-s.  •_'. :;. ) 

Choriftodon  ;  ninrdldliiH  Vkijim  i.i..   Trans.   Comi.  .Xcul..  NI.  p.   ir..    1S.S.-..-1  Iai.I,. 
r.ull.  I'.  S.  Nat.  Mils..  No.  ST.  p.  •"'>*.  1>'''^!'- 

One  valvu.  Station  L'-'fi""),  off  Ghesapeike  i'.ay,  in  70  fathoms,  188-i. 

Family  KFLLlFLLID.i:. 

KELLIELLA  NITIDA  Verrill. 
(i'lat.'S   XCt.  li-.  S:   XCIII,  tiji-  10. > 
Krilirlh,  sp.   Vkiiimm..    I'rau.s.  (.!omm.    .\ra.l..   VI.   p.  I'Tlt,   ISKl;    1-xpl.    Alh.ilro.., 

K'cpi.rt  I  .  S.  Coin,  fish  niul  I'islicrios  lor  ISSH,  p.  ."iTt),  ISS,"). 
Krilitlla  infnht  \  KI.'KIM  ,    I'laiKS.  Cniili.  .\i;h1..   VI.  it.   l:{S.  lK8r>. 

Comparativelv  few  specimens,  at  seven  .stations  between  X.  lat.  ;!•.»'' 
5'  ;!(>",  W.  lon.u.  70  II  :W,  and  N.  lat.  ;5.S^'  20\  W.  lono-.  70"  S  ;?(!'.  m 
l..")25  to  l.',0;5H  fathoms.  ISS.UISSC.  ^ 

"■  MoUuHca  Keg.  An'ti.a'  Xorvo-ia^.  p.  71.  pi.  <i.  lij;s.  :!  „-,::   ]>\.  -0.  lig.  1.  l^TS. 


NO.  Ii:i!t. 


/»/.7.7'-M-.(/7,7;  Mull  rsc.\—\i:i;i;il.].     i  \7>  Hisll. 


77n 


«Zv> 


Fiiinily    IJ'.I'TON  1 1 ).  I',  or   IllfN  ( 'I  N  1 1 ).  K. 
KELLIA  SUBORBICULARIS     Montagui. 

ri:itc  \(i\'.  li^s. :;,  1. 1 

hillid  sidiorliifiilaris  II.  ami   A.  AhvM--.  (icin'in    l,'c<ciil    Mull..  II,  |>.  IT.';   III.  |il. 

(  \1\  .  Iii;s.  S  (/-(•.  l.S.",S.  .1  I  I  I  l!l  ^  S.  r.ril  i^li  (  'lUiclioJdjrv  ,  1 1,  p.  j-.-,,  |,|,  ^  ,  in;. 
:!,  IX(i:>;  \ ,  \>.  17!>.  1>1.  W  \ll,  lii;.  L'.  I  Mill.  <.<>1  I  I.,  i;c|,.  <i||  IhmmI.  uf  M^ss., 
liiniKv's  eel..  ]>.S:;,  liy;.  :i'.ll,  ISTO. —  TuMpN-,  \iiicI.  M;iI.  <  nil.  Ii..  ]i.  171,  |il.:!.'. 
lijJM.    |:!:l.    i:i.^.    I.S";!.  — (i.  ''.   S.MIS,   Mdlln-c;!     l.'i'U.     \|-ctlr;i'    \iir\rui;i  .   ]i.  (IT.   pi. 

!!•,  lius.    II  (/  //,    jSTS. — .Irri  l;I;^ --.    I'roc.   /u.'il.   >ni  .,    I.uikIuh,   |i.   ~iui,  .lnnr. 

IS^!!.  — SMI  I  II.   I'..    A..   1,'ipnl  I    \  iiV.  (    ll.illcimil  .  /in'il.    l..llll(llilir:ilirlii,i|.i,    \|ll, 

)).  L'nl,  |Ss.",.      |iAi  I  ,  r.iill.  r.  S.  N.it.  .Mils..  Nil.  ;!7.  |i.  I'lm.  pi.  i  \  \  m.  Iil;.  "■,  l-«s  '. 

One  ri<'.^li  s|»('riiii('ii.  .M;iss;icliil.>^('t  Is  l!ii,\.  t)ll  Siilciii.  I>77.  Tliis 
sprcii'.s  ;i|»|)eai'.s  lu  lie  scry  raic  on  Hit'  .\iiicri«';iii  coii-t.  In  its  liinutv 
characters  it  scciiis  tn  a.urco  «'l()si'l\  with  llnniiit  l*liili|tiii,  l.s.'id. 

MONTACUTA   BIDENTATA   (MontaKU,. 

I  I'ImIc-   XCIII.  lius.  7.  s;    .\C1\',   liu.  1).  1 

Mjl<i  hidi  iiliitti  M()\  I  Aci  .  I't'^-i.  Hrit ..  |).  I  1.  [il.  \  \  \  1.  I'il;,  .">,  |S(i:!. 

Moiilfiiiiln  hidi  iildhi   ruiiiii  -  .iihI    IIami:\.   IIi>i.    Iliii.  Moll..   II.  ]i.  7."i.  ]>]    win. 

liys.  (p.  (!((. 
ri'lliiiiiin    hiilf  iiliild    I  I .  .iiul   A.  A  I' A  M^.  I  ■cllclM     li'irc'iil    Mull..  I  I.  |i.   I7S  ;    lll.jil.i\\, 
li^s.  :'.  -Jit.  1S.")S. 

Miiiiliiiuid  liidciiliihi  Jkii  la;^  s.  Ilriii-h  (  nm  ii(.|iM_\ .  II.  p.  I'lis.  pi.  \.  I'm.  i.  i^ii:;; 
\',  1>.  177.  pi  \  \  M.  lii;.  S.  Isdp.  -(;.  I  ».  >\i;..  .'.InllnMM  I.'^i,'.  Aid  ii  ,i-  \iii\  c:.;!;!'. 
]).  l>li.  111.  \'.K  W'A^.  17((-/i.  Is7s.— .Iia  I'Ui.s  >.  I'roc  /.cn.l.  Sue-..  Lomldii.  p.  li'.iS, 
.liiiH-.  l.ssi.-  \  laaai.i .  'rr;iii.'<.  Conn.  Amd..  \.  p.  ."i71.  issi.',  —  Hr-ii.  IrMiis. 
('(inii.  Aciiil..  \  1.  p.  17a.  Iss.'i:  I'.xpj.  .IIIkiIiuss,  i;f|iiiit  I'.  S.  ('(iiii.  ri-,li  .mkI 
I'i.slu'rics  tiir  ISS:!.  |i.  ,"i!l(l.  IsS.'i        \iil    Mantiti  nlu  hiihnldla  'ioiilil. 

<\)niiiaiati\  «'ly  lew  spt'ciiiKMis  jnivc  lictai  IoiiihI  in  Loii.u  isJaiMl  SoimkI 
and  at  'I'hiiiildc  IshuidiA.  M.  \  crrill  :  I'rox  iiH-ctowa.  Massarinix't  t^ 
(S.  I.  Smith  and  O.  Iliri.<'r):  N'incyard  Sdiiiid.  1S7.">;  (."a|ir  (  ud  I'.ay, 
ISTJt;  (iff  IdiicU  Ishilid.  ISSO:  Woods  lloU'.  .Massachusetts  (iiit  of 
Oaiiso,  and  Naiislion  (lutteisi.  ISSi'-S.!.  I^'roni  h)\v-\vater  lo  l.->.', 
fathoms.  OIV  ("ape  Ilatteras.  North  Carolina,  in  I  I  to  |s  fatliom-«.  i >;s;{ 
mid  Issi. 


m 


MONTACUTA  BIDENTATA  (Montagu.,  variety  TENUIS,  new. 

(  Plate    \CII.  i\)i.  7.  ' 

Sliell  simihir  to  tlie  typical  .1/.  Iiith  iilald  in  t'orm  and  si/.e.  hut  rela 
tividy  more  elonj^ated  and  iiioie  nearly  elliptical,  witii  the  nmiio-^  and 
beaks  somewhat  less  pronuneiit.  The  surface  is  covered  with  line  and 
pretty  regular  lines  of  j;ro\vth.  The  teeth  in  the  ri.yht  x'alve  are  strono-. 
nearly  (MHial  in  leiijitli  and  in  tlie  amount  of  di\«'r;.;('iice  from  the  dorsal 
mar.iiin.  They  diver,<'('  iiioi'c  stron.uly  and  are  thicker  and  more  promi 
nent,  especially  at   the  inner  end,  than   is  usual  in  the  tvnv  hid(nt((tii. 

Length  of  a  medium  si/e  specimen  1.7  mm.:  heij^ht,  I'.d  mm. 


780 


ri:()rii:iii\(;s  or  riii:  y.triox  ii.  misi:i\i. 


\iil  .  XX. 


A  t't'W  st'iiiiralf  \  :il\  ••>.  oil'  ( 'ape  Hal  tcias.  Ntirtli  ('amlina.  in  Mi  to  17 
latlioms.  ISSl. 

MONTACUTA   BIDENTATA  (  Montagu  i,  variety  FRAGILIS,  new. 

(I'l.'ltr  xcil.  I'm-.  x.< 

Shell  Mil)clli|tti('ai.  !ii(M|iiiIiit(Miil,  both  t'lids  broadly  ioiiikUmI.  thin, 
fiauilc.  coNfrcd  with  (h'licatc  lines  of  growth.  The  nnibos  are  liiit- 
tened;  l>eaks  Imt  .sliyhtly  prominent.  'I'iie  teeth  iti  tin^  ii-;ht  valve  arc 
stnallei'  atid  moie  delicate  than  in  the  t\  pieal  hiilciihitti.  and  di\('i',i;o 
bnl  .sli.nhll\  iVoiii  llie<h)isal  niai'.uiii.  ns  in  that  species. 

lAMi^ith.  I  inin.:   liei<ilit..">  mm. 

One  specimen  No.  KH.'Ui.  station  sKl-jT,  in  Nariaiiansett  r.a.\.  in 
S.l  to  10  t;ltlM)ms.  isso. 

MONTACUTA    STRI ATUI. A,  new  species. 
.  IM.'ilf  \CiIi.  Il,u.  !t.  ) 

Siieli  rather  lai^ie.  thin  and  sinnewinit  hvaiine.  comincssed.  broad- 
elliptical  with  t)otii  ends  \v(dl  roniHle<l.  the  anterior  mmdi  tli<'  lonuer. 
Ant«'ro-doisal  mar.yin  nearl.\  stiai.yiit  with  a  L;fa<liial  slojic:  anteriur 
eii('  bi(>a<lly  and  re.u'iilarlN  rounded,  its  ontlim  t'orndii,u'  niMi  ly  the  sc^-- 
incnt  of  a  cir<de;  ventral  inar,uin  broadly  ami  evenly  conx'ex;  posterior 
end  bluntly  loiimlcd  wilh  its  dorsal  marjiiii  slij.ilitly  coneaxciind  slop 
iny'  rapidly.  I  inbos  not  swollen:  beaks  aente  and  nnl.\-  a  liltle  proini 
iH'iit.  Sni'lace  covered  wit  h  line,  re.unlar,  concent  ric.  niicrosco|»i('  stri:i' 
and  moie  distant  lines  of  "irowtli.  interior  somewhat  shinin,y  with 
inconspienoiis  mnscnlar  scars.  Ilin,u'e-mai'^i!i  lliin.  delicate,  oidy 
sli<«htlv  thickened.  In  the  riyht  valve  there  is,  cm  each  side  of  the 
beaks,  a  short,  ra':her  delicate,  elevated.  trian<iiilar  tooih.  termiimtin- 
distiilly  with  an  abrn])t  sloj)!':  these  aie  nearly  e:|nal  in  si/.eand  len-tli. 
the  antei  ior  one  l)eiii,ii-  slightly  the  shorter  ami  more  an.yiilar.  They  ;irc 
sepaiated  l)y  a  V  shaped  notch,  the  sides  of  which  foiin  nearly  a  ri^ilit 
an.ule.  Ill  the  left  valve  there  are  two  thin,  slightly  i»rondneiit  eleva 
tions.  scarcely  worthy  the  name  of  teeth,  separated  by  a  very  wide 
allele  nnder  the  beak. 

Lenjilh  of  one  of  the  larj;est  specimens,  7  mm.:   Iiei<;iit.  ti  mm. 

This  species  is  mncli  larji'er  than  any  of  onr  other  species  ol"  this 
jieiius,  and  may  possibly  prove  to  be  identical  with  .1/.  hoiniKHii. 
described  and  tignred  by  Holmes.'  Owinj;',  however,  to  the  shortness 
ol' the  description  and  small  size  of  the  li«;iires,  this  (piestion  eanintt 
be  delinitely  decided  without  a  careful  tH)mi)arison  with  autlieiiiir 
s]»eeimeiis. 

A  lew  separate  valves  were  found  oil"  Cape  Hatteras,  Xorth  Card- 
limu  ill  lo  to  48  fathoms,  188o-84, 

1 1'ost-pleioccMf  fossils  of  South  (  inoliuii,  p.  I'.U,  j)l.  vii.  lig.  2,  18(i0. 


i 


T 


+ 

1 

\ 


5-— 7 


.\<p.  li:il(. 


Itl'J.I'-WM  i:i!   Moll  I  >'    I  -  I  1:1:1:11.1.   .1  Ml  I'l  ^-11. 


-n 


i 


MONTACUTA    OVATA  JiMfreys. 

(  I'lilli'   \C1I,    li-H.  !>.    1(1. 

I'lU'uiiiln  I'l  rnuiiiiomi  \\MH\\\.  Nuticr  i<\'  li't'^ciil  Ail'l.  lo  M;ii.  liivcil.,  I'l.  :i, 
\'Vnr.    r.   S.    N;it.    Mils.,    111.    |i.    Ilin,    IS.MI. 

Monliiiiild  iiriild  .lll1l:^^s,  I'roc.  /.oc'il.  .'>nc,,  l.ipinluii,  |).  iV.ts.  |.l.  iai,  iIm.  I, 
.hiiii'.  ISM.      \i;i;i;ii  I.,    Iiiiiis.  <'(>iiii.  .\<:i<l..  \  .  ]i.  ."iTI.  ISS'J;    \  I.  ]<.  _'T!i.  1^>I. 

A   \  «T>'   lew  .S|(('cillini.>^.  ;it    fniil'    sl;iti(»lis.  nil'   NcWlKHl.    l;il(nlr    Is1;iih1, 

iuul  <»H'  .Miiitlias  \iii('\  111(1,  ill  l<i(»  lo  I'-T  latiioiiis.  l.SSO-Sl. 

MONTACUTA    TUMIDULA  Jeffreys. 
(I'hit.'s  XCIII,  I'm.  (i:   .\(1\\  ll-s.  I.  •_'.) 

Moulin  II  til  I II  III  ill  II I II  .li;ii  ni:vs,  l'.rili>h  (  c  me  iml  (!■;>.  \  .  )i.  177.  pi.  (  .  liu'.  .">.  jsr.li.— 
(1.  (I.  S.\i;^.  Mdlliisca  i.'cu.  .Vrctirif  \nv\i-'^\:i'.  \>  nil,  pi.  \\K  li^-.  l,s  ,(  //.  1.>'7n.— 
\Ei.'i!li.i..  Tr.iiis.  ('(Hill.  Ai;i(l..  \  1.  pp.  --•"'.  '7!',  js^l;  l'.\pl.  .Ilhiitm.-^.s.  Ii'cpnrl 
r.  S.  ('0111.  Fi>li  ami  l-'i.^lici'irs   fur  is,^:;.  p.  ."i7.">.  In^S"'. 

OiK' live  spcciincii  and  I  luce  \  iiKcs.  at  tlii'cr  .staliiiii.s  Itctw  ecu  N.lat. 
4(P  7'.  W.  Ion,-;.  •;:  r>l'.  and  N.  lat.  ;;r  40'  .•{()",  NV.  long.  74  M  4.".  , 
in  Si;5  lo  1,()1>1  latlioiiis,  1  ss; I- 1  SSI ;. 


T 


+ 

I 

1 

\ 


MONTACUTA   CASTA,  new  species. 
1  I'lair  .\<'l\  .  li;;.  .-).) 

Slu'U  small,  coiiiiircsscd.  (il)loiiii-o\  atf,  wiili  tlic  aiiU'rior  ciid  coii.sid- 
erably  tlie  loii^^cr  and  bolli  vwtls  a'oout  ('(iiially  roiindfd.  licaks  small, 
scarcely  risinj>- al»(>\('  tiic  marjiin.  Siirlacc  ci»\-crcd  wiili  line,  rcuular, 
inici'osc(M»i('.  concentric  stria'  and  distanl.  rai>e(l  lines  of  ^ruu  tii.  'I'lie 
Jiutero-dorsal  marjiin  is  at,  lirst  a  little  inciirxcd.  then  slijilitl.\  convex, 
with  a  jii'adnal  slope;  the  anterior  end  is  obtusely  rounded  :  I  lie  \  cntral 
margin  is  broadly  and  evenly  rounded :  the  pusterior  end  is  sliuiitl\ 
produced  and  a  little  aujuidated  below,  in  some  s])ccimens  with  I  he 
dorsal  margin  slopin,u'  moic  rapidly  than  tiie  anterioi'  and  sli^litly 
ineur\-ed  ni'ur  the  beaks.  The  liinjit' inarji'in  is  thin  and  delicate,  in 
the  ri,i>ht  valve  thei'e  ai'e  two  nioderattdy  thick,  rather  prominent  Icet  h  ; 
tli(!  one  behin<l  the  beak  is  shorter  than  tlu^  other,  with  a  more  alirupt 
jxisterior  slope;  they  are  .se]»arated  i'rom  the  slightly  thickened  maii^in 
by  a  dee])  yrooNC  and  from  each  other  by  a  lar.^c  notch  i>r  an;L;le.  the 
sides  of  which  form  an  an.ule  of  about  DO".  On  the  thickened  margin 
there  is  a  thin.  r()u<>li,  sliallo\\  li^amentary  furrow  both  in  front  of  and 
behind  the  beaks.  In  the  left  \al\e  there  is  an  elongated,  thin,  and  not 
very  prominent,  tooth  like  elevation  on  each  side  of  the  lieak;  they  are 
nearly  equal  in  si/e  and  separated  by  a  very  bi*oad  anule. 

Leiifi'th  of  the  Iars>est  specimen,  abiuit  2.1  nun.;  heij^ht,  about  l.S  mm. 

A  lew  separate  valves,  otf  Caiie  liatteras,  ^"orth  Carolina,  in  1  I  to  17 
fathoms,  1884. 


m 


1^2 


i'ii()Li:i:inst,s  or  riii:  smkisai.  mi  >/. /  m. 


Vol..  XX. 


MONTACUTA  CUNIilATA,  new  species. 

(I'hii.H  \*  I,  iiH.  I;  .\(iii,  li^. : .) 

Shell  SI  1 1  ill!.  ('I(tii;.;;itr(l.  w  t'd^r  sli;i)»ri|,  with  :i  iiiiich  iHdtJiicrd.  ii;ii'in\v 
iiiitt'iiur  ciitl.  ;iii(l  with  tlir  duisal  nmruiiis  in';iily  >t iiii;.;ht,  siopiiiy'  ijip. 
i(ll,\.iilitl  rniiniii^  iiii  olilii.-«('  ;iii;;l('  :il  tli<'  IhmK^,  wliich  HIT  (Icciijcdl y 
lirhiiid  ilif  iidddlc.  pruiniiM'iit,  nirxtMl  inward.  .\iilt'ro  (h»r.s;il  niiiiuin 
sln|»iii;^  iMpidiy.  at  liist  nearly  st  raiyht.  hccuiMiii;;  a  litl  le  eiin\'e\.  and 
em  vin;:;  lejiulaiiy  into  tlie  v«'nlral  niar;:in.  Ilins  loiniinj;  a  soniew  hat 
rostrated,  njinow ,  e\enly  ronnded  anterior  end:  vential  Mnir,iiin  nearly 
St  iaiL;hl.  soniet  inies  with  a  >li.iiiil  inn  ir\a  tare  ojiposiie  the  heaks:  |Hi>te- 
rior  end  Idnntly  ronnded,  wit  h  its  (hasal  niar,i;in  nearly  slraiyhl,  slopinjn' 
ahont  equally  with  t  li«' anterior,  'i'he  sin  I'aee  is  eo\ered  with  line,  eon- 
eeiitiic,  rather  reuiilar  lines  of  l;|(>\\  th  and  miei'osco|iie  striatioi.s.  Into- 
I  lor  somewhat  shiniiii;.  In  the  riyht  vahc  there  aie  two  well  delined, 
pidniiiieiit.  tlii'keiied  leelh.  separated  iyy  a  laiiii.  deep  notch  niidei  the. 
beak:  t  he  anterior  one  istlie  larger  and  is  i»roadly  t  rian;^iilar.  wji  h  a 
pr(»niinent  e.xeiirved  tij),  and  is  sepaiated  Ikmii  the  hinnc  inar;:in  liy  a 
deep  I'nrrow.  which  runs  ohlicpiely  within  and  l)el(»w  t  lie  thickened  doi  sd 
niar,nin:  the  posterior  one  is  set  ohiiipiely  to  the  in  .ii^in.  t'roiii  wliich  it 
is  se|»araled  liy  a  well  delined  i;roo\-e.  In  the  lelt  \al\e  there  i'^  a  wide 
notch  lieiicath  thelteak.  uitli  a  rather  iiiroiispicii()ii>.  td  nj:ated,  .vniiie- 
what  thickened  anteiior  tooth  like  projection,  wliich  continues  tuiward 
as  a  thickeiic<l  inner  iiiar,i;in  nearly  to  the  end.  and  a  slioiter.  hioad. 
ti'ian.iiiilar  jiosterior  projection.  Color  cream-white,  soinetiines  tin^^cd 
with  pink. 

Length  of  tli(>  lar<>v.st  .speeimeii.    ilioiit  ■">  mm. :   height,  l.omiii. 

A  few  specimens  were  found  oil'  (Jape  llatteras.  North  Carolina,  in 
l'>  and  If!  fathoms.  1S.S;5-SI. 


«/> 


MONTACUTA  TRIQUETRA.  new  species. 
(J'l:iti3  XCI,  \\'^.  :',.) 

Shell  small,  covei'ed  with  reiinla''  »ncentric  grooves,  seaveely  cnin- 
])resse(l.  somewhat  triaiiji'ular.  with  a  sliiiiitly  rostrated.aii.n'iilar  posteiior 
end,  and  a  re,i;iilarly  rounded  anterior  (nie.  I'mhos  a  little  swullcii. 
beaks  nearly  central,  i)oinfed  and  a  little  pioiiiineiit.  'i'he  anterior  and 
])osterior  dorsal  maruins  form  iieail,\a  riuiii  aii.yle;  the  anterior  iiiaiLiiii 
is  sliL:htl.\  convex  and  passes  jui'adnally  into  the  somewhat  hluiiily 
rounded  anterior  end:  Ncntral  marj^in  broadly  convex,  becoinmn' 
sli,i:litly  ineurxcd  toward  the  posterior  rostration.  wliicdi  is  wcdue 
shaped,  rapidly  tapered,  with  a  narrow  truneat(^  tip.  defined  belnw  hv 
51  iaint.  radiatin.u'  ridjie;  postero-dorsal  mar<;iii  is  nearly  straiji'lit.  and 
slopes  rapidly  from  the  beaks.  The  surface  is  sculptured  with  stroiii^ly 
marked,  smooth,  rounded,  eoneentne  ridycs  havinji'  the  upper  cdye 
smooth  and  lecurved;    these  are  separated  by  deep,  rc;;ular  grooves 


J 


1  -\ 


^% 


V 


nm.  ii;i'.'. 


Di.i.i'-w  \  ii:i;  Mill  I.I  SI  A-\  i:i;i:ii.i.    i\/»  in  su. 


"S.'J 


wliiili  ;i|>|>i';ir  in  mhiic  ii|;iit>  tn  'Ntciitl  IicimmIIi  iIic  ii|)|ifi  cduc  nl  ilic 
li(l;i«'s;  (III  t  lie  iiiiihos  ;niil  iM>.>lcii<>r  lost  riilii  I  ln-sc  lid^ics  ;iiitl  :^|(mi\i's 
ln-((»iii«'  Icrlilc  :iii(l  irrciiulai-.  like  liiu's  (»!' ;;io\v|li.  I  iitt'ni;ill,\  llif>iir. 
I;itr  i.>\\liil<'  ,\\\\\  siiioolli,  with  the  imisciihir  ^cais  liitlicr  stMiii^lv 
iiiai'krtl. 

Tin-  iiiii^fiiiar^iiii  is  ratlicf  tliick:  in  tlirii^ht  valsr  t  lific  me  two 
stroiiu.  nioMiincnt .  cnivi-d.  canlinal  trrtii.  separated  l»y  a  larye.  >iiine- 
what  ol»li(|ne  noteli  wiiieli  extends  npwaid  intu  tlie  I  teak:  t  he  p.istei  iur 
toutli  i-^  the  iniri'Dwei'  and  nmre  piotiiineiit.  with  tlie  tip  eni-\ed  I'o.'wukI 
and  upwaid;  the  anteiim  Inoth  is  ennneeted.  jnst  in  iVuiit  ufthe  l»e;d<, 
li.\  a  luiil'ut'  like  e\tensi(»n  to  tlie  I'xteiinil  maiuiii.  h'avinu'  itetween  tin' 
(oolh  and  t  he  inai'iu:iii  a  deep  sni>niiii',ii'iinil  yiooNc;  tiie  inner  edj^e  of 
tile  hinL;('inai,nin  is  a  Ut  t  le  tliiekened  to  foi  ni  a  rid;jc  eontinnons  w  it  li 
theanleiiof  tooth.  In  liie  h>lt  xalvetheic  is  a  distinct  ih)teh  nmh'i' 
thi'  iie.ik  lor  the  eartilaue  or  resilinni:  in  front  of  this  is  a  |»ioniineiit. 
tooth  like  thiekeidn^'  of  the  nniruin  of  the  shell,  the  proximal  end  of 
w  hii  h  hecfMni's  ti»oth  like.  l)nt  is  eoid  ininnis  w  itli  the  rest  ot"  the  liin;;t' 
margin:  behind  the  noteh  I  here  is  ih)  todt  li  and  I  he  inai'^in  is  only  a 
little  tiiiikened.  withonl  any  s|)eoial  ;•  uninence. 

Length,  altoni  L'inin.:   height.  1.1  nii; 

'I'Wo  valves,  station  L'MOT.  off  Cape  llatteras,  North  ( 'aiolina.  in  III 
fathoiiis,  18SI. 

TELLIMYA   FKRRUGINOSA  (Montagu). 

I  i'i:iic  \>',  lij:s.  7,  s. ) 

rdl'innjii  J'l  rrii<ihii>f«i  II    ;niil  A.  Aoams,  (irn<M;i  l.'ccfiit  Moll..  II.  ji.  17!',  1H."S. 
Miiiiliiiiilii  firnujhioxd  .]\:v\  \\v.\>,  !'..iti>li  (  niiili(il();4\ ,  11.  ]).  L'ln.  iso:; ;  \,  p.  17s, 

|)1.  \  VNI.  liir.  !».  lS(i!t. 

J'llliiiiiiii   I'l  rrihiiiiond  (i.  ( ).  Sa1!s,  MoIIiisi',1    licy.  Ardicii'  .\or\«)L;i,i'.  p.  "n.  pi.  -'n, 

li,i:s.  1.  "-'•.  l^TS  — \iaani, I  ,  Trails,  rm.ii.  Aiml..  N  1.  -'-"i,  pi.  ws.  li^-.  VX  IMXI. 

UoiiliKiilii  frrriijiiiiiisii   I'isciii'.i;,  Mnniii-l  ile  (  tmctiv  liiiloiiic.  p.  1027.  lij;.  77.").  ISS7. 

iilliiiniii    l'rrni<iiiio:^a   D.M.I.,  Hull.  I'.-'^.Niir.  Mmh..  NO.  :)7.  ]>.  ."lO,  i>I.  MA.tin'.  i;{.  tSS!t. 

A  few  specimens  were  tbnnd  at  low  water  at  Woods  Hole,  Massa- 
chusetts (( 1  nt  of  ('anso).aiid  (liitters  of  Xaushon  Island.  ISSi's;;.  'I'hc 
lij^ineof  the  liviii;^  aidinal  published  by  N'errill  in  ISSI  has  been  copied 
by  Dall.  Fis(  her.  and  others.     We  now  yive  additictnal  ones, 

KELLIOPSIS,  iK-w  cjtuius. 

I't/pc. —  MoiitdCiifii  lirratd  Stini]tson. 

The  shell,  in  size  and  form,  icsendjles  h'lllid  ami  Moiihirnld.  In 
both  vaives  there  is  a  small,  prominent,  anterior  tooth  and  a  low, 
eIon;;ated.  thickened  posteiior  ridi^e.  scarcely  amonntin^'  to  a  tooth. 
The  resiliiim  is  larjie  and  is  attached  to  an  elongated,  obliipie  e\ca\a- 
tion  on  the  proximal  eo^e  (»|"  the  posterior  tooth-like  ridjic  and  also  to 
a  trian.uular  ])it  beneath  the  beak:  it  bears  a  large,  elongated,  ciirveu 
ossicle.     Soft  parts  not  observe<l. 


\U 


Mili 


(X 


i'i;()(  i:i:i)is(.s  or  riii:  \  iTiaxii.  i//N/;ri/. 


Tliis  <4<'inis  :ii»|)c;irs  lo  be  closely  allied  to  MoiilKciifa.  l»iit  dillers  in 
not  haviiiu'  :•  dcliiiite.  raised.  |)(»steri(>r  tooth:  in  liaviii<>'  a  lar,ue,  elon- 
;;ated  posterior  eartila.^c.  bcariii.y-  a  lai'<;e  ossiele  uttaebed  to  a  special 
jii'oove  aloii,!^  a  tootlilike  ridiic;  and  in  luivin-i'  tlie  structure  of  the 
hin-iv  in  both  valves  nearly  the  siiine.  In  the  position  of  the  resdiuni 
it  lesenibles  Er^-hta,  but  the  latter  has  two  lar.ne  teeth  in  both  valves. 

KELLIOPSIS  ELP:VATA  (Stimpson). 
,|-|.'it.s  MM  II.  li-s.  L'-l;   \(I\  .  lisH.  7,  S.) 

Moiil'iviitii  hnhiilalii   (ion. II.  I.'cp.  <in  Invert,  of  Mii.-i.s.,   l-I  I'll..  ]>■  ."it,  isll.       Not 

ol'    .M(iiitai;u.  > 
Muiiliiciilii  (!('.;il(i  SiiMi'xiN.  SliclU  of  New  I'.ml:..  |>.  Hi.  is.M. 
Cildiiiiinii  (lirtiliiiii  11.  and  .\.  Adam-.  (Iciicim  l.'cieiii  Mull..  II.  p.  177.  18r>S. 
Moiilaiiilii  clt-nild  (iot  l.D,  lie]".  <m    liivt-n.  of  .M.i.ss.,  r.iiinf,v"s  ed.,  ]).  SC.  li;^-.  liiKi, 

1S7(I.— I'lMON,  .\mcr.  Mar.  (OIK  li..  ]).  17l'.  }>l.  wxiii,  liu.  HO.  ls7;i.— Vkiumi.i., 

i;f|uiil    liiMit.  An'mi.  of  \  iiicyaid  Sd..  in  1st  K't'p.  I'.S.  l'i>li  Com.,  pp.  MIM, 

tiSS,  IS7I  ^antll.  cop.,  p.  I  IS). 
IWunijii  I'leviilii   ItAi.i.,  iinll.  I'.  S.  Nat.  .Uiis.,  No.  :<7,  p.  .Mt.  pi.  i.w  iii,  lig.  i;  .as 

Moiiliiciild  ilcnihi  Stiiui).soii  1.  ISSli. 

This  rare  species  has  been  obtained  at  low  water  mark,  at  .Sa\iii 
Kock.  near  New  Haven,  Couneeticut  (.1.  Iv  Todd),  1S71;  Welltlecl, 
.Massachusetts  (Webster),  ISTl);  Woods  Hole,  .Ala.^saeiiusetts  ((hit  of 
("ausoi.  bSS-J;  Naushon  Island  (dutters  and  Sheep  I'en  Cove),  IsSi'; 
and   Narra,<;an.sett  Hay,  in  S.\  to  l»i  fathoms,  1S8(). 


« ■« 


Fanuly  1  )1 1'LODONTll  ).i:. 

I'lHlHliiiidii    I'isi  iiKi; :    hiplinutnt'idii  +  Vriiptodoiil'id'i   l>all. 
CRYPTO  IDON   Tuftoii,-|S22. 

Tijpi.—Criijttoihn  jU'.niosiis  [  MontiljiU  •. 

The  typical. species  of  this  yeMiis  have  no  distinct  teeth  in  either  valvo, 
but  the  inner  marjiin  of  the  hiuji'e  plate  is  more  or  le.s.s  tlnckened  or 
swollen  in  tVont  of  and  behind  the  beaks.  The  lij;ament  is  i)osterior  and 
lies  in  a  lou.u',  curved  furrow  in  the  midst  of  the  nnirji'intil  tiiickenin- ; 
wheie  it  commences  at  the  beak  it  is  marginal  and  external,  but  as  it 
runs  backward  it  recedes  from  the  edj-e  iind  becomes  more  oi  h'ss 
internal  and  invisible  from  the  exterior.  Moreover,  the  posterior  end 
of  the  shell  h:is  one  or  more  <listinct  radiiil  corrugations  or  plications 
to  ,uive  the  thin  shell  stren;^th  enouj^h  to  resist  the  action  of  the  lar^o 
post<'iior  adductor  musch'  whi<di  is  attached  directly  upon  the  princi 
pal  plication.  The  pedal  muscle  is  tittached  to  the  ui>per  i)licatioii 
when  the  latter  is  present.  Many  writers  have  adopted  the  name  of 
A.iiitHH  Sowerby,  isi*;*,,  for  this  <>cnus;  the  latter  Uiime  was  f;iven  to  a 
tertiary  species,  the  structure  of  which  is  not  fully  deteriidned.  It  may 
belonji'  to  a  very  distinct  {r<Mins.  Moreover,  Turton's  name  seems  to 
have  actual  priority  of  publication. 


i 


NO.  IKi'J. 


DEEi'.w  AiKn  MoLLi  s(j—r]:j;i;i/.L  .IM>  iirsn. 


785 


CRYPTODON  GRANDIS  Verrill. 

CriiplodoH  (jrniidia  \i:i;i;i[.L,  Trails.  Conn.  Acad.,  VI,  ]>.  \'M\,  pi.  xr.iv,  tin'.  L'J,  IW."); 
Kx])!.  Jlhalross,  \{f]H)rt  I'.  S.  Com.  IMsIi /ind  Fishciifs  I'm'  issii,  p.  r.75.  IMS."). — 
Dam..  Itiill.  I',  ^i.  .\iit.  .Miis.,No.  ;{7,  ii.."().  i>l.  xi.vi.  i'm.  I'L',  ISS'.t. 

,Silii;()lIiii  rii8  i/rinidii  {iHtrn)  Iax'.vud,  Caiiipayuo  dii  ''  Candnii,"  Aiinalfs  (!<•  I'lni- 
veisiU'  do  Lyon,  p.  1)^0,  1S9(). 

This  large  siiid  iiitcu'stiiig  sjx'oies,  described  in  detail  and  wril  lifj- 
ured  in  tlic  first  article  (juotcd  above,  is  a  tiiic  ('niitfothni, 'd\lh(n\'^\\ 
\ery  distinct  IVoin  any  of  oar  other  species.  Tlierel'ore  it  seems  stranj;o 
that  jM.  Locard  has  referred  it  to  the  Ae.ry  dill'erent  j^enus,  Sclii:(>fli<iri(s 
of  Conrad,  which  l)el()n<;s  to  tlie  Mactridir.  Ih-  ident  ilics  witliout  (|ues- 
tion  a>  sinjilo  valve,  <lredjied  by  tlie  C((ii<i<ni  off  the  coast  of  I'rancc.  in 
1,71()  meters,  as  our  species.  It  is,  tlierel'ore.  doubtl'nl  \vlieth<  r  liis  speci- 
men is  congeneric  with  ours,  for  the  latter  certainly  has  no  aflinity  with 
tSclii.:()tli(iri(,s. 

One  live  spe(;iTneu  and  a  few  separate  valves  \V(>re  drcd^-ed  at  tlirce 
stations  between  N.  hit.  ;5So  2<)',  W.  long.  7;P  H'.  ami  X.  hit.  .V.  >  W  50", 
W.  loiiy.  7.P  57'  40",  in  O.'.S  to  1,582  latlionis.  ISS.l-Sl. 

CRYPTODON   INSIGNIS,  new  species, 
d'lafr  \CI,  li.us.  I,L'.) 

Crjiptixloii  unrKii  \'i:i;i:ii.i.,  I'lnc.  I',  S.  .Nat.  Mns..  til,  p.  ;i'.i:i,  ISSO;  'I'rans.  Cdnn. 
.\<:id..  \'.  ]).  r>70,  ISSL'. 

Shell  unusually  larfje  and  thick  for  the  ucnus.  opa(|ue  wiiite  or 
tin<i('d  faintly  with  reddish  internally.  Outline  somewhat  variable, 
usually  broad  ovate  (U*  sulxpiadrate.  usually  moderately  swollen,  some- 
times rather  compressed.  I'mbos  moderately  lar.ii<'.  not  \ei'y  promi- 
nent; beaks  small  and  turned  forward.  Liinule  coidate,  rather  lar.nc, 
j>retfy  well  delined.  The  radial  folds  and  lobes  are  less  marked  than 
is  usual  in  this  oeniis.  .\  well-inarked  fold  or  shallow  undulation 
extends  from  the  beak  to  the  posterior  niarjiin,  opposite  the  scar  of  (he, 
adductor  muscle;  anterior  to  this  there  is  abroad,  sliiihtly  raised  ridn'c, 
e\tendin<;'  fiom  the  umbo  to  the  siphonal  lobe  of  the  niarj^iii;  in  front 
of  this  there  is  usually  a  broad  faint  depression  of  the  surfa(;e  which  is 
scarcely  api)aieiit  in  many  .specimens;  a  posterior  oroo\-e  iiiiis  close  to 
and  nearly  ]»arallel  with  the  jiostero-dorsal  mai,i;in.  The  antero  dorsal 
)iiargin,  in  the  lunular  re,i:ion,  is  straight  or  sli.i;litly  iiiciiive(|;  tlio 
antei'ior  end  is  short,  a.  little  ]U(>miiient  below  the  liinule.  and  olitiisely 
rounded;  the  ventral  niaroin.  is  very  broadly  rounded,  usually  with  a 
slightly  more  ]>i'omiiieiit  lobe  at  or  just  bcliind  the  middle,  w  ith  a  mor<i 
de(!ided  but  obtuse  projection  (siidional  lobe)  lait  her  back  where  itjoins 
the  jiosterior  margin,  which  is  usually  somewhat  incurved. correspond 
inji'  to  the-  external  wa\'e  like  de|)ression,  becomiiiji'  coii\-e\  o|)|)ositc  t  l;e 
posterior  external  fold:  the  postero  «lorsal  mar;4iu  slopes  raiiidly  froii. 
tlio  beak  and  is  sometimes  broadly  rounded,  and  at  others  sli^hl  ly  con- 
vex. The  surface  is  covered  with  couspicuous,  mure  or  less  irregular, 
Proc.  N.  M.  vol.  XX 50 


786 


rnori'jEDiXGs  of  the  nattoxal  museum. 


VOL.  XX. 


roniuled,  obtuse,  olU'ii  pioiiiiueiit  lines  of  growth  with  a  tliin  yellowish 
brown  e|)i<leniiis  which,  under  the  lens,  is  closely  covered  with  minute 
granules  often  arranged  in  more  or  less  distinct  concentrit!  lines.  The 
posterior  hinge-margin  is  somewhat  tliickeued,  the  ligamental  groove 
is  long  and  <;urved,  <livergiiig  considerably  from  the  margin  of  the 
shell  at  ils  jxistcrior  end  and  extending  forward  under  the  beak.  Mus 
cular  scars  and  palliallinein  the  largest  specimens  strongly  marked  ;  the 
anterior  scar  is  considerably  elongated  and  has  a  number  of  lobes  or 
scallops  on  its  inner  margin. 

iiength  of  a.  medium  sized  specimen,  L'7  mm.;  height  from  siphonal 
lobe  t(/  beak,  L'7  mm.;  bieadth,  11  mm.  Length  of  a  larger,  more  ovate 
vspecimen,  .'Jli  Uiui. ;  height  from  siphonal  lobe  to  beak, .».")  mm. ;  breadth, 
21  mm. 

This  s[)ecies  ])re8«'nts  considerable  variation  in  outline  and  in  the 
degree  of  convexity  of  the  valves;  some  are  sulxpiadrate  in  form, 
others  subcordate.  and  others  pretty  well  rounded,  but  the  majority 
are  i>b]ong  obvate  Avitli  a  posterior  truncation,  corresponding  to  the 
broad  radial  groove;  some  of  the  valves  are  considerably  inllated,  but 
most  of  them  are  mor(;  compressed  than  is  usual  in  this  genus.  There 
is  also  considerable  variation  in  the  i)rominence  of  the  siphonal  lobe 
and  broad  radial  ridge,  and  in  the  size  of  the  lines  of  growth,  which  in 
some  specimens  are  <]uite  tine  and  regular,  and  in  others  nneveidy 
de\eloped,  those  on  the  anterior  part  appearing  almost  like  conttentric 
ribs. 

Many  separate  valves,  at  four  stations  between  X.  hit.  44°  5l',  AV. 
long,  mo  4(J'  45",  and  N.  hit.  V2o  11)',  W.  long.  (itP  47A',  in  G")  to  171 
fathoms,  1871>  and  188;"). 

The  single  valve  I'ound  otf  Cape  Cod,  187!»,  and  identified  as  Cryp- 
todon  fiarsii,  i)roves  to  be  the  young  of  this  species.   . 

CRYPTODON  PLICATUS  Verrill. 

(I'liito  lA'XXIX,  n,u.  (1.) 

('riiiitinlou  pricaliig  Veurili..  Tnins.  Conn.  Acial.,  \I,  pp.  -VAT,  ir)(),  18S."). 

One  young  live  specimen  and  one  imperfect  valve  of  this  character- 
istic and  fragile  species  were  found  at  two  stations,  olf  Marthas  \'ine- 
yard,  iu  1,073  to  l,lL>li  fathoms,  1884. 

CRYPTODON  CROULINENSIS  (Jeffreys)  Smith. 

(I'liitoXC,  liys.  :{,  4.) 

ClniiniiKi  o'oidinriiKis  .Ikkkhkys,  Ann.  Jtat,'.  N^at.  Hist,.  XX,  p.  19,  1817. 

Aj-iiiim  iioiiliiicntiiti  Jia  I'UEVS,  Biit.  Con.,  II,  ]i  L'.'id,  ISdl.— (;.  <*.  Saks,  Molliiscii 

Ivoy.  Aniticio  Norvej>iii',  p.  62,  pi.  19,  ligs.  8,  a-b,  1878. — .JM'^mcvs,  Proc  Zoiil. 

Soc,  London,]).  70;i. I  uiu',  1S81. 
Criiptodon  cvoiiliin'iiniH   SMrrn,   \].  A.,  Kcporl    Voy.   VhulU'iujtr,   Zool.    Liunolli- 

l.riuichiata,  XIII,  p.  im,  1885. 

Shell  small,  oblicpiely  subovate,  with  the  beaks  prominent,  and  the 
anterior  end  considerably  the  longer.     The  autero-dorsal  margiu  is 


'' 


■ 


i 


i 


t 


NO.  1139. 


DFfji'-ir.rn:/;  Mor,i.rs(\\—vi:ui;iLi.  .i\n  nrsu. 


787 


'' 


is 


nearly  straij^ht,  slopiii";'  rii[)i(lly  fVoiii  tlic;  beak  :  the  anterior  cud  is  dis- 
tiiictly  produced,  OAeiily  rounded;  t\n\  ventral  niar<;in  is  slji^htly  but 
rejjfularly  convex  to  tli(^  lower  ])osterior  loM;  the  posterior  end  is 
marked  by  two  distinct  plications  separated  by  a  rather  iirondneiit 
ridj^e  which,  at  the  inar<;in,  appears  as  a  rounded  ])r()jevition  separating;- 
two  reentrant  curves;  the  jiostero dorsal  nuirjii.'i  is  convex,  sloping? 
rapidly  to  the  up[»er  plication.  The  li.i;anieutal  aiea  is  relatively  Uir<;e, 
long,  elliptical,  delined  by  a  di.stinct  gioove.  Intei-nally  the  liinj;e- 
inaryin  is  consiibnabl}- thickened,  especially  directiy  under  the  beak, 
where  there  is  a.  slight  swelling;  the  jtosterior  ligament  oceuities  a 
very  distinct  groove,  and  extends  forward  under  the  tip  of  the  beak. 

Length,  3..")  inni.;  height,  3.ir>  mm. 

The  shell  heie  referred  to  this  species  api)ears  to  agree  well  with  the 
ligures  and  descri[)tioiis  given  by  (1.  O.  Sais.  It  preity  closely  I'esein- 
bles  .some  varieties  of  ('.  (joiihlii.  The  prinei)»al  dilferences  <'xter- 
nally  are  in  the  somewhat  more  pro<lnc».'d  anterior  end  and  the  lonuer 
and  straighter  antero-dorsal  nuirgiu:  the  posterior  plications  are  also 
less  strongly  develo[)ed. 

Found  in  small  iiuad)ers  at  about  thirty  stations  north  of  ("ape  Cod, 
between  N.  lat.  i3'  UA',  W.  long.  (i!»  l'l>',  and  N.  lat.  41.'"^  .iO',  W.  h»ng. 
70^  38',  in  13  to  73  fathoms,  1873-1STI>. 

CRYPTODON   CROULINENSIS  (Jeffreys)  Smith,  variety  ALTUS,  new. 

(I'hitr    I. WW  III,    li-s.    I,  -2.) 

Shell  higlu'r  than  long,  larger  than  the  <'onnnon  foiin.  limbos  i)romi- 
nent.  elevatecl  and  turned  forward,  so  as  to  leave  a  rather  large,  con- 
spi(au)us,  tiatteued,  luiiiilar  area,  which  is  bordered  externally  by  a 
slight  ridge,  followed  by  a  concave  depiession  in  the  surface,  which 
forms  a  slight  indentation  in  the  anterior  margin,  and  resend)les  the. 
p(»sterior  plication,  but  is  more  shallow.  The  antero-dorsal  nuirgin  in 
the  lunular  region  is  slightly  concave,  but  slopes  very  rapidly;  the 
anterior  end  is  a  little  nioic  produced  than  the  posterior,  but  both  are 
decidedly  short;  the  ventral  margin  is  pretty  evenly  lounded ;  i>oste- 
riorly  then>  are  two  distinct  i>lieations;  thc^  lower  or  larger  one  is  mod- 
erately sunken  aiul  extends  from  the  beak  t<»  the  posterior  margin, 
the  upper  one  is  much  shorter  ai;d  narrower  and  delines  the  narrow, 
lanceolate,  ligameiital  area;  each  produces  a  decided  indentation  in 
the  margin,  that  caused  by  the  lower  one  Iteing  more  sharply  delined 
and  shorter  than  the  other,  these  are  sei»arated  by  a  well-defmed, 
curved,  radiating  ridge  which  extends  a  little  below  the  margin;  the 
jHjstero-dorsal  margin  is  strongly  convex,  evenly  rounded,  with  a  rapid 
slope;  the  hinge  margin  is  e<»nsiderably  thickened,  especially  beneath 
the  beak,  and  in  the  right  vahe  forms  a  distinctly  raised  tubercle. 

Length,  5  mm.;  height,  <»  mm.     I'-astport,  IMaine,  1S70. 

Auother  specimen,  from  station  -!>!-*,  is  slightly  smaller.     Length, 


788 


i'i:nc/:i:i)i\(;s  or  tin-:  xatioxm.  misium. 


vol,.  XX. 


L 


l..">  iiini.;  lK*ij;lit,  ."i.L*,")  nun.  In  tliis  tlio  anterior  or  iipix-r  plication  is 
much  loss  <listin(;t  than  in  the,  type,  iiiid  it  is  tiicrelort;  possible  that 
this  feature  is  abiioi  nial. 

CRYPTODON   EQUALIS,  new  species. 

(I'llllr   \([,    liiiS.  ."..  C.) 

Sliell  ol"  moderate  size,  {ji'a\  isli  wliite,  rather  swollen,  ])yrifbrin,  usu- 
ally a  little  lii.u'lier  than  loii.u',  but  sometimes  the  height  and  length  are 
about  efpuil,  Cmbos  lathcr  pniminent:  beai;s  median,  conspicuously 
raised  above  the  mai'gin  and  cnrved  stron.uly  forward  so  as  to  proibu-e 
•,i  rathei'  deej*,  bioad,  cordate,  but  ill  delined  binular  aiea.  Anterior 
and  posterior  ends  neaily  equal,  The  doisal  margin  sIojjcs  rai)idly  on 
Ixttli  sides  of  the  beak:  anteriorly,  in  the  bnnilar  re,ni<»n.  it  is  nearly 
straiju'ht;  the  anterior  end  is  ])rc1ty  eveidy  rounded,  Ibi'nunj;'  a  continu- 
ous curve  with  the  ventral  nnir.uin,  which  forms  lu-arly  a  semicircular 
ciiive;  the  posterior  end  lias  one  broad,  shallow  undulation  which 
causes  a  slight  incurvature  in  the  postcro-ventral  margin;  above  this 
the  dorsal  mai.iiin  is  very  slightly  convex  and  Ibrms  an  an.iile  at  the 
commencement  of  the  told.  The  lif^anuMital  area  is  marked  by  a  smooth, 
lonj;',  lanceolate,  sli<ihtly  sunken  portion,  clearly  sejiarated  by  an 
inci.sed  liiu'.  The  j;eneral  suit'ace  is  covered  with  slightly  marked, 
moic  or  less  irrc.u'idar  lines  of  growth.  The  hin;i<'-niar.i;in  is  moderately 
thickened  and  is  essentially  the  same  in  both  valves.  There  is  a  well 
marked  swelling;-  both  betbie  and  behind  the  beak  and  a  more  con- 
spicuous one  imnu'diately  uinlcr  it:  a  less  conspicuous  thickeninj;',  with 
its  external  c(l,i:e  e.xcnrved.  extends  alon.u'  t!ie  ]tosterodorsal  margin, 
in  the  li.uamental  region.     .Muscular  and  pallial  scars  indistinct. 

Jjen.ii'th,  .">  mm. ;  height,.").]  mm.;  thickness,  t  mm.  Some  specimens 
are  somewhat  lai'i^cr  than  this. 

In  the  lar,iie  sei'ies  which  we  have  i-f  this  species  there  is  some 
variation.  In  sonm  cases  the  form  is  less  swollen,  tlie  length  is 
slightly  in  excess  of  the  height,  so  that  the  general  outline  is  more 
evenly  I'ounded.  The  S])ecies  is,  however,  notable  for  the  e(|uality  of 
the  anterior  and  postcrioi'  ends  and  the  [irest-nce  of  the  single  slight 
undidation.  Crinttodon  iioiihlii  somewhat  resembles  this  species,  but 
ditfers  in  being  longer  in  i»roportion  to  its  height,  in  its  more  com- 
pressed form,  ami  in  having  two  distinct  folds  or  undulations.  It  is 
also  closely  allied  to  C.Jhriiosits  of  iOurope,  but  is  more  pyiitbrm  in 
shajM'  and  hu'ks  the  aiiteiior  angidation  noticeable  in  that  s[)ecies. 

Taken  at  thirty  two  stations,  between  N.lat.  47"^  10',  W.  long.  -17^  3.")' 
.".(»",  and  >;.  hit.  M  OS',  W.  long.  71  :VV.  in  '.M  to  l,o;;7  fathoms,  187.'!- 
1S8(J. 

CRYPTODON  PLANUS,  new  species, 

(Plate  LXXXVJII,  li^rs.  ;?,  |.) 

Shell  small,  wellrouiuled,  the  length  and  height  about  e(|ual,  Avitli 
the  beak  small,  promiueut,  nearly  central,  curved  strougly  forwurti, 


I 


V'Tl 


13!). 


in'F.i'-WATEi;  Moi.i.i  s(A—\i:]n;ii  I.  .i\n  ni  sii. 


7. ^9 


^1 


i 


tbniiiiij^'  n  siiKilI.  siinlicii.  liciirt  sIcijkm!.  luiiiil;ir  Mi'ca.  I'ostcrioi'Ij- 
tlicic  i.s  only  ii  fiiiiit.  (i('|»i('ss«'(i  uiidiilatioii.  w  liidi  causes  l»iii  ;i  sliirlit 
indciitiitioii  or  aii.nuliitioii  in  the  niar.yi!!;  Ix'liind  this  tlic  snrt'acc  i-ises 
sli^^litly  and  Ibiins  an  incoiisi»icu()Us  I'idov  snn'oundin.u' tiic  liiiaiucntal 
area,  which  is  h)nj4'.  rather  nai  r<»\\ .  and  sunken,  so  that  its  iiiar.i;in  is 
scarcely  visible  in  a  side  view,  'i'lie  dorsal  niarjiin  is  a  little  conxcx 
and  slojyes  but  little,  and  about  eijually  on  botii  sides  of  the  beak:  the 
anterior  end  is  widl  lonnded  and  sli^^ht  ly  prcMliu'cd  :  t  lie  ventral  inar<iin 
is  broadly  rouinled,  a  little  i>rodnced  in  the  middle,  and  nearly  >trai.uht 
or  very  sli;.;htly  incnive<l  ])osteriorly.  opposite  the  undulation;  behind 
this  t  here  is  a  slight  obtuse  angulation  corres))oiidinj''  to  the  ridiic  lielow 
th(!  li,ii:unental  area.  Surface  dull  <;rayish  white.  'I'he  hiny*'  nnirjiin  is 
<'onsiderabi\'  thickened,  especially  Itelow  the  beaks  ami  luiiular  area. 
ami  a  thickened  lidyc  also  extemls  Itackward  beyond  the  lii^aniental 
area.  Tliere  is  no  distinct  tubercle  nor  tooth  like  projection.  Tlu^ 
]K)steri()r  li,uainent  is  unusually  stron-i.  and  occupies  a  ratliei' consi>icii- 
ons  subinar^yinal  ji'roove  wlncli  runs  forward  under  the  beak  as  a  thin 
incised  line. 

Lenytli,  4  mm.:  hei<;ht,  the  sanu'. 

l''ouml  in  S  to  !(•()  fathoms,  north  of  Cape  Cod,  in  the  ( 1  id f  of  Maine, 
Casco  l>ay,  I>ay  of  l-'undy.  and  Halifax  llarbitr.  is7i.'-l,s,s."). 


I 

i 


CRYPTODON   OBSOLETUS,  new  species. 

I'lillr  lAWIX.   liu'S.    1.   L'.  . 

Sliell  small,  hi,ulier  than  hui;.;'.  with  the  ends  and  \'entral  mai'u'in 
rounded.  Cmbos  .somewhat  promiiu'iit  and  swollen:  beaks  cuivcd 
stron<;ly  Ibrward.  Posterior  plication  ol)solete,  or  neaily  so.  only 
visible  in  certain  ])ositioiis,  and  imperfectly  defined  by  a  faint  undula- 
tion of  the  surface  and  mariiin.  i'he  aiitero  dorsal  niaruin  is  slightly 
convex  in  the  lunular  area,  and  slopes  lapidly  to  tlu;  broadly  rounded 
anterior  nnir.^in  with  which  it  tonus  a  vers  slight  and  \'ery  obtuse 
anyle;  the  whole  ventral  mar.iiin  is  well-rounded,  a  little  produced  in 
the  ndddle:  tin*  i)()stero-(l(U'sal  maruiu  is  l)roadI.\'  convi'x  and  ends 
distally  in  a  \ cry  obtuse,  i-oundcd  an<ile,  al)o\-e  which  there  is  a  sliuht 
iid)endin.n of  the  ed.u'e.  The  hinji'c  ]ilate  is  rather  t  hick,  especially  pos- 
teriorly. The  li;.:aiuent  is  rather  str()ii<>'  and  considerably  cm  ve(i  ami 
occujiies  a  narrow,  but  very  distinct  j^roove,  mostly  within  the  marj;in 
l)()sterioily,  and  extends  forward  under  and  in  trout  of  the  beaks.  The 
anterior  hinji'e-inar^'in  is  thickened  and  a  little  tlexuous  toward  the 
anterior  angh'  of  the  shell:  the  in'oximal  end.  Just  under  the  beak,  is 
slijihtly  thi(tkened  without  Ibrnnnii  any  apparent  tooth.  I'nder  tlu^ 
microscope,  the  surface  is  covere(l  witli  rather  coai'se.  iri'cunlar,  con- 
centric undulations,  and  line,  raised  lines  of  jjrowlh,  bec(miin^  smoother 
at  each  end,  wheie  there  are  ])atehes  of  a  closely  adher«;nt  coatinj;'  of 
red  mud  and  iron  oxide. 

Length,  2.4  nun.:  height,  L'.d  mm. 


mmmmm 


790 


rnocKEDrxas  or  riri:  xatioxm.  MrsFinr. 


vol,.  XX. 


Four  speciiiiciis,  at  three  stations,  oil'  .Alartlias  N'incyard,  in  KK)  to 
;{!l(>  tatlioins,  18S0-1885. 

AXINULUS,  new  subgenus  or  genus 

Tjipe. — A.i'iinihis  hrcris,  new  species. 

We  ]>rop()se  tliis  division  to  inelnde  tliose  s])e('ies  wliieli  aj^ree  witli 
Cruiilodoii  in  tiie  eliaiaeter  of  tlie  liin^c  and  liuanient,  bnt  lack  tln^ 
plications  oftiie  shell,  and  iiave,  therelore.  a  snialh-r  posterior  addnctor 
niusch'. 


CRYPTODON   (AXINULUS  I  BREVIS,  new  species 
(Tint.'  I.XXXIX,  li-^H.  7.  S.) 

Shell  small,  short,  tlie  lieij^^ht  exceedinji'  the  length,  somewhat  pyri- 
form,  with  slightly  prominent  und)os  and  small  stU)central  beaks,  which 
are  but  little  ]>ronnnent  and  turn  forward.  The  antero  and  postero- 
dorsal  niar;4ins  are  al)ont  eipial  in  lenj^th,  the  latter  sliyhtly  more 
broadly  rounded  than  the  foi'mer.  which  is  a  little  incni'ved  neai-  the 
beak  so  as  t(»  form  a  very  sli,i>ht  lunnlar  area;  both  ends  arc^  broadly 
rounded  and  nearly  equal;  the  ventral  mar<;'in  is  slii>htly  (ionvex  and  a 
little  produced  Just  in  front  of  the  middle;  an  exceedingly  faint, 
seai-eely  discernil)le  undulation  runs  tVom  the  beak  to  the  ))osterior 
ventral  marji^in.  The  suilaee  is  covered  with  very  line,  close,  i)arallel 
lines  of  gntwtli  visible  only  when  much  magnilied.  (Jrains  of  line  fer- 
ruginous sand  or  mud  usually  adhere  closely  to  the  suiface,  both  ante- 
riorly and  posteriorly.  The  i»osterior  ligament  is  well  dc^veloped  and 
oecui>ies  a  well-marke(l  marginal  groove:  a  small,  thickened,  more 
internal  portion,  situated  Just  behind  the  beak,  within  the  margin, 
appears  to  be  continuous  with  the  external  ligament.  The  inner  edge 
of  the  dorsal  nnirgiu  is  slightly  thickened,  for  a  short  distance,  Just  iu 
front  of  the  beak. 

Length,  2.\  mm.;  height,  2.5  min. 

Several  live  specimens  and  sei)arate  valves  were  found  at  six  sta- 
tions, between  X.  lat.  40  10'  M)",  W.  long.  CT^  ,V  l.V.  and  X.  lat.  aS^ 
2L",  W.  long.  70^  17'  30",  in  084  to  1,825  fatlioms,  1883-188(1. 

At  station  2208  was  tbund  a  single  imperfect  valve  closely  resem- 
bling this  species  but  of  much  larger  size. 

Length,  5.5  mm.;  height,  (i.5  mm. 

It  is,  however,  nuich  less  legular  iu  outline,  having  a  nearly  straight, 
ra[)idly  sloping  antero  dorsal  margin,  merging  very  abruptly  into  the 
broadly  and  very  slightly  curved  and  sloping  anterior  nnirgin,  forming 
a  somewhat  angular  and  little  i)roduced  anterior  end:  ventral  nnirgin 
strongly  convex,  curving  gradually  into  the  ixjsterior  margin  whicii 
slopes  rapidly  from  th'.'.  beak;  ])ostero-dorsal  maigiii  is  convex  but 
rises  only  a  little  above  the  outline  of  the  distinct  ridge  which  border 
the  ligaiueutal  area. 


«^ 


NO.  IIM. 


T)i:ei'-wati:i!  Mtii.Lrsc.i—vKinui.i.  asd  i:i  sii. 


701 


CRYPTODON  CAXINULUS^   INF.QUALIS,  new  species. 

(I'liitc  xr.  n-s.  1,  2.) 

Slieil  siiKiU,  soiiiewliat  oblonj;,  with  the  nntciiof  t'lid  iinicli  tlir  longer, 
Unil)'>s  rather  i>roiiiiiM'nt,  hcaks  elevated,  eiiiNcd  strongly  t'orwanl,  so 
as  to  h^UAe  a  small,  (leej)  limulai'  area.  The  aiitero-dorsal  inar^in  is  at 
lirsl  nearly  straight,  slopiitji'  Imt  little,  and  is  nearly  |tarallel  with  the 
ventral  margin:  the  anterior  end  is  produced,  broadly  and  eveidy 
roniuled:  tin;  \entral  nuirj^'in  is  ninch  less  ronnded.  with  the  nn'ddle 
portion  almost  straiuht  for  a  short  distance,  towaid  tlii^  posterior  end 
it  is  sid)trnncate  and  slijihtly  anjinlated :  the  postero-dorsal  marjiin  is 
convex  and  sl(»|>es  rapidly;  a  veiy  slij^ht  depression  ri;ns  Irom  the 
beak  to  the  postero  ventral  nuir^in,  bnt  is  so  sli<ilit  as  to  be  scarcely 
worthy  the  name  of  ]dication  or  told;  posterioi"  to  this  there  is  a  dis- 
tinct snbinarji'inal  rid^.-c  se])arated  by  a  lather  deep  jiioove.  from  the 
liji'amental  area,  which  is  lon<i"  and  nariow.  The  snrfacc  appears  (o 
the  naked  eye  nearly  smooth,  blnish  white:  under  tli<'  micros<-o])e  it  is 
marked  by  slijiht,  raised,  concentric  rid.i;<'s  and  faint  undulations, 
which  are  the;  most  regular  and  distinct  on  the  and»o.s.  in  addition  to 
these  the  whole  surface,  when  hi.iih]y  nni,i;nilic(l,  has  a  line  librons 
ai)pearance:  on  some  i)aits  theie  are  remnants  of  a  thin,  pale  yellow- 
ish epidernns.  The  hin.neuiarjiin  is  distinctly  thickened,  with  a,  slight 
]»rotnberance  directly  under  the  beak,  wiu-r*!  it  is  thicker  than  else- 
where. The  ])osterior  liyament  is  rather  lar<i'e  and  sfronu.  and  occu- 
]>ies  a  consiucnous  groove  extending  from  under  the  beak  about  one- 
third  the  length  of  the  postero  dorsal  nnirgin, 

Length,  1..")  mm.;  height,  4.2.~>  mm.;  thickness,  about  4  mm. 

2V  few  specimens  have  been  found  in  11  to  \\)  fatiioms.  at  about  eleven 
stations  north  of  (,"ai)e  Cod,  in  Casco  Bay,  and  in  llaliiiix  Harbor, 
1873-1875). 

CRYPTODON  (AXINULUS)  SIMPLEX,  new  species. 

(I'l:ifo  XCII,  li<,'s.  :;,!.) 

Shell  snudl,  tliin,  fi'agile,  translucent  bluish  white,  somewhat  intiated, 
nearly  circular  in  outline  and  witliout  any  i)osterioi'  undidations.  Hcaks 
small,  acute,  slightly  ])rominent,  turned  forward.  Antcro-dorsal  mar- 
gin excavated  in  front  of  the  beaks  an<l  convex  farther  forward;  ante- 
rior nuirgin  broadly  and  evenly  rounded  and,  with  the  ventral  nnirgin, 
forms  nearly  a  circular  curve:  the  ])osterior  margin  similarly  rounded, 
but  slightly  tiattened  in  the  ndddle;  ])(»slero-(lorsal  margin  broadly 
convex  without  any  distim-t  angulation  jtosteriorly.  The  surface  is 
nearly  smootli  and  sonuMvhat  glossy  on  the  undtos;  it  is  marked  by 
rather  indistinct,  sum  11,  concentric  waves  or  undulations  and  ndcro- 
seo])ic  lines  of  growth.  Interior  somewhat  shining.  The  hinge-margin 
is  thin.  deli(!ate,  ami  very  simple,  «ith  but  a  very  sligiit  thickening  in 
the  region  of  the  beak;  a  narrow  groove  Ibr  the  ligament  is  visible  Just 


ummsLosssimmmmmim 


!)•_* 


ri;nci:i:iti\(:s  or  rni:  \  irmwii.  i//v/;r.u. 


VIII,.  XX. 


bcfon' iiiul  hci'iiHl  the  beaU.s,  l»iit  tlicrc  i.s  no  tootli-like  pioiuiiieiice  at 
any  point. 

Lcnj^tli,  about  .'i.l  mm.:  liei/^lit,  about.'?  nun. 

One  impcrrcct  .spcciincu.  station  KKKJ,  X.  lat.  ;!!)'^  .^)(J',  W.  lon^-.  (>!•' 
'ir.',  in  :U\)  latboms,  issi'. 

Tiii.s  species  is  reiuaikable  for  tiie  piainiu'ss  ol'  its  surface,  aud  the 
simplicity  ol'  its  liini;(',  as  it  lias  ueitlier  radial  undulations  luu'  tooth- 
like  ])roJe(!tious  on  the  liin.i;('niar^in.  In  tbini  it  ureatly  resembles 
Arino/isis  <>rhicHl((l(i.  but  lacks  the  conspicuous  concavity  in  tlu; 
anfero  dorsal  nunj^in.  It  has.  lio\ve\er,  a  \tM'y  obvious  ])ostei'i(U'  lifi'a- 
uuMital  furrow  in  the  same  relative  position  as  that  of  other  species  of 

(')\l/l)f(>(l(HI. 

A  siuj-le  valve  taken  at  Ivistport,  Maine,  ISTli,  a<;rees  closely  with 
tlie  tyjte  in  form,  but  is  sonu'wiiat  less  thin  aud  hyaline  and  the  beaks 
are  a  tritle  more  pioniinent.  The  surface  has  faint  aud  rather  distant 
concentric  undulations,  visible  only  under  the  mieioscope,  beiny  most 
distinct  on  the  umbo.  The  microscoi)ic  sti'iations  are  a  little  more  dis- 
tiiu't  ami  in  some  liuiits  yive  to  the  surface  a  librous  or  finely  verndc;- 
ulate  appeaiam;e  when  hi.uhly  uuiiinilied.  This  character,  however, 
has  been  noticed  in  other  species.  The  hinye-mar;nin  is  a  liitle  nu)r(^ 
thickened  and  has  a  minute  swelling'  on  the  inner  margin  Just  beneath 
the  beak,  sc;ircely  worthy  the  name  of  tooth;  the  liyanu'ntal  .groove  is 
also  somewhat  more  stronjily  nuiiked.  This  may  prove  to  be  a  distinct 
species  more  nearly  related  to  A.riiiopsis  nrhiciildhi  from  which  it  differs 
in  havinji'  the  autero-dorsal  margin  convex  instead  of  stronj;ly  concave, 
and  the  <>eneral  outliiu'  more  evenly  rounded,  and  a  less  evident  tooth- 
like thickening'  of  the  hin,u'e  niarj^in. 

Length,  about  -.S  mm.;  height,  about  ll.ti  mm. 

CRYPTODON  (AXINULUS)  PYGM^EUS,  new  species. 

(Piiitc  i.xxxvi,  lijr.s.  ;i,  1.) 

Shell  minute,  somewhat  compressed,  trausverselj'^  ovate,  inequi- 
lateral, with  tiie  antei'ior  end  the  long«'r.  and  with  a  slightly  jn'oduced 
])osterior  angulation,  Suiface  scarcely  lustrous,  covered  with  line 
lines  of  growth  and  microscopic  striations,  ami  more  or  less  incrusted 
with  ferruginous  mud,  esi)ecially  posteriorly;  there  is  barely  a  trace  of 
a  posterior  fold.  lJnd)os  a  little  ])romineut,  beaks  snuill,  slightly 
raised  above  the  margin,  and  turned  a  little  forward.  The  autero- 
dorsal  margin  is  nearly  straight,  or  sometimes  slightly  convex,  with  a 
slightly  excavated,  snuill,  lunular  area:  the  anterior  end  is  broad,  con- 
vsiderably  ]>i'oduced,  aud  evenly  roumled;  tlu^  vential  nuirgiu  is  broadly 
rounded,  not  at  all  ])rodu('ed,  and  joins  the  ])osterior  margin  in  a  snudl 
obtuse  angulatifui,  above  which  the  dorsal  uuirgin  is  slightly  convex 
and  slojx's  rapidly  frcun  the  beaks. 

The  inner  surface  is  smooth  with  inconsjucuous  muscular  scars. 


r 


\ 


«.;.* 


NO.  ino. 


i)Ki:i'-\y\rii;  )i>)!.i.fsr.\  .  vi:i;nii t.   i\i>  nis/r. 


798 


ul 


'I'lif  liiiiy('iniir,i:in  in  llic  ri.ulit  Viilvc  is  sli;ilitl\'  tliickciicd  witii  :i  dis 
tinct,  tooth  like  jn-omiiu'iict'  Itclow  niid  sli<;litly  in  tVont  of  tlie  ct'nlci- of 
tlic  licak.  and  an  inner  lold  like  tliickcniiij:  of  tlir  |iost«'iioi-  margin  to 
NUppoit  tiio  li.yaiiMMit  ;  in  front  of  the  lunnlar  area  tiie  niar{,^iii  is  con 
vex  ami  sli};litly  cvcitcd. 

liCMif^tli,  about  l.dnini.;  lioiuht,  about  1.1  mm. 

A  few  live  specimens  were  found  at  three  stations  between  \.  kit.  ll'~> 
■10',  W.  Ion,:;.  47  '  'Ar>'  ;U)",  ami  X.  kit.  ;}!>  :.!'  .'.O".  \V.  k)n':-.  7(i  L'O  .  in 
LMM;  to  4J»!»  fatlioms    ISS.'J-l.SSC.. 

This  species  is  allied  to  ('.  I'cminiiio.sns  (l-'oibesi.  tVom  w  liieli  it  ditVers 
in  its  distinctly  produced  and  aiijjnlated  posterior  end.  and  lonj^er  or 
more  produced,  ev<'nly  rounded  anteiinrend.  It  also  has  considerable 
resemblance  in  form  to  (J.  iortuosn.s  At'Wn'ys,  but  that  has  a  very  lus- 
trous surface  and  more  vitreous  texture,  and  moreover  entirely  lacks 
the  posterior  anj^ulatM)U. 

C.  suItorahiN  of  delVreys,  scenrs  to  resend)le  lather  closely  the  small 
.specimens  of  this  species,  but  that  has  more  proiiuuent  beaks,  is 
Avedge-shaiicd.  the  autero-doisal  marjiin  sloping;  pretty  rapidly  from 
the  beak,  instead  of  bein;^  nearly  straij^ht  and  horizontal  as  in  our 
species. 

CRYPTODON  (AXINULUSi  FERRUGINOSUS  (Forbes), 
(i'lat.'  I. WW  II,  lius.  7,  X.) 

Crypiodon  ftrriif/iiioniiK  \i:i;iai.i,,  '1  runs.  (Onn.  Ai:i(l..  V,  ]>.  ."iTd.  |ssl':  ^  I.  \>.  -~\\ 
ISSl ;  Mxpl.  .Ilhiihii-^K,  K'r|)cirt  I'.  S.  (Jniii.  l'i>li  iiiid  I'islii  lies  lni  iss:;,  ]i.r>7ri, 
l.ss."").— D.U.I.,  I'.iill.  r.  S.  N'Mt.  Mils.,  \().  :!7.  ]).  ."id.  iss!t. 

AsiniiH  firrinjindxtis  l.oc.vun,  ('.niipiiiinf  dii  ('midaii,  .\iiii;ili's  dc  niiiNcisiti  ilc 
L.voii.  i>.  tin,  Isik;. 

This  very  connnou  species  was  found  at  numerous  stations  from  N. 
lat.  4L'^  47'.  W.  lon,y.  (11  01',  to  N.  lat.  •T)'^  IL"  10".  W.  Ion-;'.  71  -^  ~u'  1.5", 
in  Vlbh  to  ],r>2,"i  fathoms,  18S0-18S0. 

CRYPTODON   (AXINULUSi  OVATUS,  new  species. 
(I'latt's  \C[.  li-;-.  7;   .\C1II.  li;;.  1.) 

Shell  small,  ovate,  not  swollen,  with  the  jxisterioi'  end  ]U'odnced  and 
somewhat  i)oiuted,  rusty  bi'own  in  color  and  heavily  inciiisted  with 
iron  oxide.  (Tmbos  rather  llatteued:  beaks  small  and  concealed  by  the 
coating"  of  fei'ru<;im)ns  matter.  Tlu-  anterior  end  is  well  rounded  with 
a  nearly  semicii'imlar  curve;  the  ventral  marj^in  is  broadl.\  convex; 
the  posteiior  margin  is  tapered  and  i)ro(luced  at  tlu^  end,  with  the 
dorsal  margin  a  little  convex  and  sloping  rai)idly.  The  hinge-margin 
is  a  little  thickeiM'd  ami  nnudi  obscureil  by  the  incrustation.  In  the 
left  valve  there  is  a  rather  i)romiuent.  blunt,  tooth  like  swelling  below 
the  luuular  area;  in  the  right  valve  there  is  a  corresi)oiiding  uolcli 
{lud  a  rathei- Avide  ligauu-ntal  furrow  commencing  beneath  the  beak, 
and  running  back  subi)arallel  with  the  dorsal  margin,  becoming  more 


i^ll 


,    JagSBI.;  ,-A, 


71)4 


ri!nri:i:iti\(:si  or  the  \trio\u.  mi  si:i  m. 


vol..  XX. 


iiitoniiil  i»ost«'i'i(»rly.  .Inst  l>en«';itli  Mic  beak  is  an  clonjiati'fl  tootli-likii 
tliicki'iiiii^i  of  tlic  iniMT  iiiar;;iii  wliicli  <'(His«M|ii('iitly  ciirvt's  downward 
at.  this  poinl.  Muscular  scars  uliitisli.  iiicoiis|iicu(His.  The  external 
surface,  so  I'ar  as  visible,  seeius  to  be  smootliish  with  irrej^uhir  lines  of 
growth. 

Len^Mli.  l.(i  mill.:  hci^^ht.  I.I  nun. 

Tw«)  valves,  slal  ion  iM!),  N.  hit.  40"  :5',  W.  lonj;.  7(P;M '.  in  l(t(»  fathoms, 
l.SSl.  This  species  is  encrusted  very  niiicli  us  ('rii/>t<)<li)ii  ( A.riiniliis) 
J'rrriijiiHnsiis,  iuit  is  (piite  different  in  its  niiich  more  st  roiiuly  de\ clopetl 
hiiijie  and  ovate  form. 

From  station  LMl.!.  N.  hi\ .  A'i  >]>{)'[)[)" ,  \V.  lonj-.  To"  l!>',  in  l.">  tatlioins, 
there  ai'e  tlirei^  specimens  (No.  ',i~)'>'M  )  of  coiisideralily  larger  si/.e  which 
agree  (doselx  with  this  si»eeies  and  are  i)rol)al»ly  identical,  'i'hey  are 
more  extensively  enciiisted  with  ferrngiiious  miid  and  are  somewhat 
higher  in  ]>roportion  to  their  leiii;th;  the  \entral  margin  being  slight ly 
produced  in  the  middle,  but  they  have  the  same  posterior  angulation 
and  the  same  evenly  produced  anterior  end.  The  beaks  are  larger, 
rounded,  and  relatividy  more  ])romiiient  above  the  margin.  The  hinge- 
margin  is  very  thill  and  delicate,  but  does  not  ditVer  essentially  in  other 
resjiects  fr(>m  the  smaller  s|iecimeiis. 

Length,  2.(»  mm.;  height,  L'.-  mm. 

AXINOPSIS  ORBICULATA   G.  O.   Sars,  variety  INEQUALIS,  new. 

(I'lati-  XCII.  li^s.  r>.  t;.  > 

.t-iiiiojish  orhiciilatit  (i,  (>.  Saks,  Molliiscii  \U'<i.  Arctic'r  Niirveijin',  ]).  tiH,  ))1.  !!•, 
Ii;;.s.  !!((-(/,  1S7S. — N'KlJIiiLl,,  'rr.iiis.  Conn.  Ai-iiil..  \',  p.  .".(Ill,  I.SS2.— liusil, 
J'roc.  r.  S.  \!it.  Mus..  \l,  i>.  LM;!,  1.1.  i\.  li,-.  I.  ISSIt. 

The  inuiKMous  speeimens  of  this  species  show  considerable  \iiriation 
in  form  and  character  of  the  hinge.  Many  speeimens  show  the  eardi- 
nal  tooth  and  jiit  as  described  and  lignred  by  (i.  O.  Sars;  others  have 
the  hinge  niargiii  nearly  smooth  or  with  mere  rudiments  of  a  tooth  and 
jiit.  Our  speciiiK  IIS  uioreover  show  a  thin,  eontiiiiious  external  liga- 
ment, which  should  be  lacking  according  to  Sars' description, but  he  may 
have  overlooked  it.  In  form  many  of  our  specimens  are  evenly  rounded, 
as  figured  by  .Sars,  but  others  have  the  antero-dorsal  margin  more  con- 
cave and  the  anterior  end  somewliat  ])rodiiced,  while  the  i)ostero  dorsal 
margin  is  somewhat  straighter  than  usual. 

Speeimens  from  tlie  JJay  of  Fundy  have  a  somewhat  oblong  form, 
with  the  ventral  margin  more  nearly  straight  or  but  slightly  convex, 
and  with  the  anterior  end  distinctly  ])ro(luced.     This  ionn  seems  sulli 
(Mently  distinct  to  receive  a  varietal  name,  and  \ve  therefore  propose  to 
call  it  variety  htequaiis. 


1 


I 


Nl>.  1131). 


l)i:i:i'\y.{Ti:i;  .M<>LLis<\{-n:i;i;ii.i.  .i.v//  /;/>//. 


TK') 


1 


1 
I 


AXINOPSIS  CORDATA,  new  species. 
f  IMiitf   \('\'II.  Iii;s.  .-..  (1.  1 

Slu'll  .srii:ill.  wliitc.  Hiimolliisli,  ruiiiidrd  ur  soiiu'wliitl  I'oidjilt".  lni,L;cr 
anteriorly,  witli  small,  Iitll«i  laoniincnt  Itraksciirviiij;  lurwaKl.  Antcitt- 
dorsal  margin  a  iittU>  coiivcx.  slopiiij;  <iiadually  and  itassinj-' sonii'wliat 
alii'iiptly  into  tiic  antrrior  nnir^iin.  wliiili  is  Inoadly  and  oldnscly 
ronndcd:  vnitial  nnnjiin  stronjrly  <(»n\  ex,  sonicw  inil  produced  inlln> 
ndddle;  p(»sterior  niariiin  pretty  «'venly  rounded,  exej^pt  in  tiie  middle, 
wliert'  there  is  a  sli;.;ldly  produced  piulion  eorrespondin^'  to  tlie  jdiea- 
tioa;  |>(>stero(l()rsal  niar;;in  stronj-iy  eon\e\  in  llie  middle.  'I'lie  snr 
faet!  is  marked  by  line,  mieroseopie,  eoneentrie,  stria'  and  irrej^nlar  lines 
ot"  };r()\vtli  whieli,  on  the  lunbo.  appear  as  slij^ht  undnlations.  The  li;;a- 
inental  area  is  rehitively  larue.  pioniinent  in  the  middle,  ami  delined  l»y 
a  distinct  j;i'(K)ve,  beyond  which  there  is  a  well  marked  but  low  radiat 
iiij;  ridji'e  or  ])lieation  which  Ibrms  iin  inconspieiKtus  ])rojocti<ni  at  the 
inarj^in;  anterior  lo  this  there  is  a  veiy  sli;;lit  wa\elike  depression  of 
the  Burlaee,  nnicli  as  in  most  s])Ovk's  ol  Cniiihuldii.  The  hinjic  niarj;in 
is  decideilly  thick«'ne(l;  in  both  valves  there  is  a  rather  larjic.  obtuse 
tooth  ,).ust  l)el(tw  the  beak,  troin  which  it  is  separated  by  a  rather  larf^e 
space  for  the  li^'iiment  which  runs  bacdiward  for  a  short  distam-e  in  a 
(;()Us])icuoussnbmarginaI  ^rooNc,  Ix-conun;;'  intcu'ual  distally;  anteriorly 
the  ;;T()()ve  is  luirrow  and  outside  the  marjiin. 

liCn^th.  about  2  mm.;  heijiht,  the  same. 

This  species  is  ret'erred  to  the  {i'cnns  A.rinopsi.s  with  some  doubt, 
aIth()Ufi,h  it  has  tlje  distinct  cardinal  tooth  and  lijianu'iit  j^i'oove.  It 
has,  however,  a  sinjile  posterior  plication  sindlar  to  that  seen  in  some 
species  of  Cri/pttxiou:  but  the  character  of  the  ])lications  vary  in  that 
genus,  in  some  cases  being  very  strong  and  in  others  obsolete,  or  nearly 
so.  In  fact,  the  jicnus  A.rinopsi.s  can  hardly  be  distin;.;uished  from  it 
except  by  the  distinctly  developed  cardinal  tooth,  which  is  only  ])ar- 
tially  ditferen tinted  frcnn  the  juoximal  end  of  the  anterior  hinge-plate. 

A  few  separate  valves  and  two  live  young  were  found  at  six  stations 
between  N.  hit.  40°,  W.  long.  71  '  11'  -M)",  and  X.  hit.  .'{5°  41",  W.  long. 
740  54'  -M)",  in  4;i  to  LM)2  fathoms,  1,SS0-1SS4. 

The  young  siiecimens  from  stations  S7<>  and  *M'->  are  referred  to  this 
.'-])ecies  with  considerable  doubt,  as  they  have  a  nuudi  more  rounded 
outline,  although  the  hinge-margin  is  similar. 

AXINODON,  Ile^^^  genus. 

Type. — A.rinodon  cllip/iciis,  new  sjiecies. 

Shell  thin,  rounde<l  or  ovate,  witlnnit  jdicalions.  Hinge  with  one  or 
two  small  or  subnidimentary  teeth.  Ligament  internymphal,  poste- 
riorly so  far  internal  that  its  inner  end,  distally,  is  attaclied  Itelow  the 
iuuer  edge  of  the  hinge-plate,  and  therefore  covers  its  entire  breadth. 


« 


i 


71i()  rnnci.ritiMis  (H'dii:  s  \  iio^M   misiim.  m.l.xx. 

AXINODON   KLMPTICUS,  new  species. 
(I'liilrrt  XC,  liuH.  ."..  tl:   .\<ll.  li^'.  1.) 

SIm'II  siiiiill.  iM'iii'ly  siMiMitli.  s\\oIl«'ii.  (riiiisvcrscly  clliitticiil  and  soiiio- 
wliiit  <iI)|mii<;',  witli  iMllitr  protninciit  iiiiilxis  iiiid  with  tli<>  IxmKh  con- 
.sidciiihly  iM'lihiil  tlic  iiii(l<ll<'  iiiid  ciiiNfil  loiwiird.  'i'lir  iiidrro doisiil 
iiiiUffiii  is  d»'rid('dly  foiiv  ('\  iiiMl  sdiiicwliut  cNnirxi'd.  tlir  aiilii'ior  «'iid 
is  loiijicr  and  ;i  lit  1  If  I  decider  lliaii  t  lie  pusinioi;  hot  li  arc  nearly  evenly 
r(Mind<-(l;  t lie  ventral  inar;.>'in  is  in-oadlv  rniinded  and  nearly  straiuht 
litr  a  short  distance  a  l(»n;4  1 1 K'  middle;  I  he  |M»>t(  ro  doisa!  luar^rin  !>*  •'<>ii- 
\('\  and  Mii'rjii's  into  the  posterior  end  in  a  re;;iilar  enrve.  The  Innular 
area  is  rather  distinct,  but  without  any  very  delinite  ixmndaiy.  'l\\v. 
snrl'acc  is  nearly  snioctlli,  cuvcred  only  with  line,  (d(»>e  lines  ol'  <;rowtli. 
which,  nnder  the  nneroscoitc.  appear  as  delicate,  laised  lines,  separated 
by  jirooves  ol  ahont  the  same  width;  this  sculpture  is  \ cry  leynlar 
ovei'  most  ol'  the  siirlac*',  but  on  ihe  nmbos  sonn' ol'  the  rid;;es  are  so 
lar,i;»'  as  to  appear  like  small  nndnlations.  The  interior  surface  is 
smooth  and  white:  the  mi iscidar  scars  are  indistinct  ;  the  liinu*'  niar<;in  is 
rather  thin ;  the  jxislerior  liyaineiit  is  piomiiient.  wed<>-e  shapeil.  widest 
<listally.  and  occupies  ii  distinct  groove  covering  the  whole  breadth 
and  exteiidinji  about  oiM' third  the  iciiiith  ol'  the  jiostcro doisal  maij^in 
and  rnnninj'  forward  undi'r  tlie  Ix'aks.  In  the  left  valve  there  are  two 
slijuhtly  raised,  iniiiiitc.  obscure.  I'ouiidid  teeth  under  the  beak,  of  whicli 
the  anterior  is  a  little  more  distinct  than  the  other:  farther  forward, 
aiul  separated  from  (he  latter  by  a  slight  notch,  there  is  an  elongated 
tliickeninj;  of  the  niaiuin  foriniujn'  ••  '^*»'t  of  lateial  tooth  or  lamina  and 
separated  from  the  outer  edj^e  by  a  narrow  j^Toove.  In  the  li.uht  \  alvo 
the  anlcrioi'  tooth-like  t hickeiiinji'  is  less  distinct  and  there  is  only  a 
very  slight  rounded  swellin;;'  of  the  lunular  margin  under  the  beak. 

Lenyth,  ."..."•  mm.:  heijiht,  .'J  mm. 

Tw(  live  specimens  (No.  .T)!;.".),  staticui  L'O'.Mi,  N.  lat.  .".JP  22'  20",  W. 
lon^^  70  '  ."ii"  20",  in  1,^51  liuhoms,  JSS.'i. 

LEPTAXIN  US.  new  genus. 

Tjipr. —  L('i)ta.viuttH  )n  ill  Kills,  new  s])ecies. 

SIh'II  small,  short  ov;ite,  iiuMpiilateral.  with  the  anterior  eiul  tlie 
lonjicr.  and  rouiid<'d,  and  the  ])Ostei'i(U'  end  tapered  and  anj;ulated, 
with  a  sli«>ht  jtlication.  Jlinge-plate  well  <leveloj>ed,  with  a  delicate, 
lateral  tooth  on  both  sides  of  the  beak  in  the  rij;lit  valve.  an<l  one  ])0s- 
terior  lateral  tooth  in  the  left  valve;  in  both  valves  with  the  ju'oxiinal 
end  of  the  hinjie-i)lat(;  eiilarj;'ed  and  thickened  near  the  beak,  that  of 
the  left  valve  most  d«'\  eloped  and  risiiiji-  into  a  blunt  tooth-like  ]>romi 
nen<!e.  Ijij;ament  commenciuji"  under  the  beak  and  runninj''  back  (Ui 
the  ventral  side  of  the  i)osterior  hin<^e-i)late,  so  that  lor  the  greater 
l)art  of  its  length  it  is  internal. 


i 


TT 


N>>,  llittl. 


hi.i:i'-\\  A  I i.i;  Moi.i.i  .SI  .1    \  i.nuiLi.  .i.s/*  /./>// 


:>7 


Tin's  <;onn.><  difVcrs  \'v()\\\  Cti/ntinlnii  in  the  UhM'v  iiiicrii;il  |Misjtioii  of 
tlic  li<;:iiiM'lit  iiimI  in  Inisiiii;  liistiiict  hitciiil  tit-lli.  I'min  A.iiinnlnn.  in 
tli4>  sit'ori*;*-)  liin<>'c  pliitc,  in  tin*  inrsciici-  ol'  I  he  liit<'i:il  tn>i  \\.  in  iia\  in;; 
:i  postcrioi- pliiMtinn.  :ni(l  in  liirlvinu disi  in<-i  (Mriiin;il  hcili. 

LKPTAXINUS  MINUTUS,  new  spucics. 

(I'lair  i,,\\\i\.  tin-. ;;-:..) 

Slirll  niiniitf,  lii(i;i(lly  <»\  ;iU',  witii  ii  sli^iitly  |tiiHhnc(i  t»l»tnsc  jioint 
near  the  inidilN-  nl'  llic  pnstciioi'  cnil.  and  a  soincwiiiir  piiMliicrd, 
Itroadiv  iniindcd  aiih'iior  end.  licaks  Itfiiinii  tin-  iiiiddlf.  I'isiii;^'  ;i  liitl*' 
alM)\  <•  tlic  dnisal  inar;;in  and  tniiicd  tnrw  aid,  Ira\in;;'  a  sniali.  lat  licr 
dcfp  lunnlar  area.  Aiilt-ru ddisal  inari;iii  a  liltlc  ('(iiivcx.  slupin^i' Ixit 
little;  aiilci'ioi  inar.uiii  I)  oadiv  and  cv  riily  roiiiidtMl,  tunniii;;  nearly  a 
scinicirt-'lc,  and  passing;-  ('ontiniioiisly  into  llic  xt'iitial  inariiin,  wincli 
is  a  little  iiioic  liniadly  roundiMl ;  the  ijosfcrioi'  inai  uiii  is  suiiifwiial 
an;;idar,  w  it li  a  distinct  iiroininencc  a  little  liclow  t  lie  middle,  wlieii^ 
tlio  radial  lidjie  teiininates,  lielow  this  tor  a  slant  space  llie  mar- 
\*\\\  is  neail.N  stiaiulit  or  sli^^litly  iiiciir\-ed:  al»o\c.  the  ]»ostei<> dorsal 
iiiarjiin  is  sti'ai,i;lit  as  far  as  a  sli;;lit  annie  in  the  liuanieiital  aiea.aliove 
which  it  iscon\e\  totliebcak.  'I'lie  hiii;;*'  niaij^in  is  a  little  thickened. 
and  in  the  left  \alve  I'oiiik  a  lathei-  ]iidiiiineiir  and  soinewhat  aii;;iilar 
to(»tli  Just  below  and  sli^ihtly  in  IVont  of  the  lieak  ;  the  liya  mental  <;ioo\  e 
is  haroly  visible  on  the  inner  face  of  the  posteiictr  hiii^c  inariiiii,  and 
runs  t'orward  as  a  narrow  <jroo\e  beneath  the  beak:  in  the  i't;ht  \al\e 
there  is  a  somewhat  less  prominent  tooth  Just  under  the  lieak.  liehind 
which  the  lijiiMueiital  .i:roo\e  forms  a  distinct  iiotcli  in  the  iiiar^^in. 
I'nder  the  micioscope  tiiere  is  seen  in  both  \al\es  a  distiiicr  sid»iiiar;;i- 
iial  ri(l;4(^  with  a  conspicuous  yroovt?  beliiixl  it.  c(tminenci!iL;  a  consider- 
able distance  behind  the  l»eak  and  I'lninin;;'  in  and  alony'  the  inner 
hiiijiejiiarjiin  :  there  is  also  in  the  ri^ht  \'alve  a  short,  indistinct  groove 
along  the  end  of  t  he  hinue-iiiaryiii  in  front  of  the  beak.  I".\lciiially  a 
rather  shallow,  depressed  undulation  runs  from  the  licak  to  tiiepos- 
tero-ventral  mar.iiin;  Ixdiind  it  is  a  nai'row.  l»iit  slightly  prominent, 
I'adial  rid.uc  running;'  to  the  jiosterior  auiile:  back  of  or  alio\-e  this  a 
lather  slioit  lijiamental  area  projects  beyond  the  marjiiin.  'I'iie  snrface 
is  covered  with  a  t hin,  <;r(*enish  yell<»w  epidermis  and  is  marked  i)y 
liiu",  ]»retty  i-ejiular.  parallel,  raised  lines  of  Liiowth.  and  also  lainl  and 
rather  numerous  radiatiiiu  lines  which  are  not  \isii)le  except  under  a 
hi  Jill  power. 

Lenj;th,  nearly  1-  mm.;  height,  1 'i'  mm. 

One  live  specimen  (  No.  l;">(I.St>j,  station  UIK,  N.  lat.  40  '.V ,  W.  Ion;;.  7(  * 
.■Jl',  in  KM)  fathcuns,  1881. 


71)8 


rnocEi'.hiM.s  iiF  Tin:  y.moy.iL  .i/tn/.tu. 


Vnl..  \X. 


Fjiinily  ASTAIMM  DJO. 

ASTARTP^  NANA  (Jeffreys?)  Dall. 

Antinlr  ntuiit  Kai.i..  Hull.  Miis.  ('iiiiii>.  /(x'll.,  \II.  ]>.  Jill,  \A.  \ii,  lius.  (i<(,  (i/;,  Is.st;; 
Hull.  r.  S.  Nil!:.  Mils.,  No.  :{7,  i).  Iti,  jil.  \  ii,  li<rs.  i\»,  tl//,  188!t. 

A  siri,i;lo  valve,  wliicli  ii}j;n'es  pt'i'l'ectly  with  Dall's  lij^iires,  (|iiotc(l 
above,  was  Ibmid  at  station  L'."«07,  olf  Cape  Ilatteias,  Xoi'tli  ( "arolina, 
in  43  I'athonis,  18S4.     South  to  Sombiero.  in  L'2  to  I'.KJ  fathoms. — Dall. 


Family  (U\S1MI)ARIILE. 

In  the  classification  of  tliis  fainilv  wc  have  adopted  the  groups  pro- 
posed by  JNIessrs.  \V.  11.  Dall  and  M.  A.  Smith  as  dclined  by  Mr.  Dall.' 

We,  howevei',  consider  his  two  siib,i;'eneric  groups,  Vardiowija  and 
Jlalonymplia,  as  distinct  jicnera. 


CUSPIDARIA  UNDATA  Verrill. 
(I'hitos  I.XXIl,  lin,  1;    LXXVIIl,  ligs.  :{,  1.) 

Xciira  uiidaiii  \i:i{iai.r,,  'rrims.  Cnmi.  Acml.,  VI,  ]>\).  L'L'.'i,  217,  1S81;  Expl.  .Hha- 
irox.s,  tvi'port,  r,  S.  Com.  I'inIi  and  I'islu^i'ics  fur  ISS;!,  p.  'u\,  1XS'>. 

Not  MjioiHiii  iiudatii  Dam,,  1*>iiI1.  :Miih.  Coiiii).  Zoni.,  XII,  pp.  ^02,  'M\.  isHti;  Hull. 
U.  S.  Nat.  Mils.,  No.  ;37,  p.  fiS,  lSS!t  (in  i)art). 

Three  live  s))ecimens  and  two  valves  wcie  found  at  stations  LMIDS  and 
2r»(>(J,  oil' Chesapeake  Uay,  in  LM'L'I  and  'l,i\^{)  fathoms,  188.'!  and  1S8."). 

Frafjnients  obtained  by  the  lllalc  near  Havana,  Dominica,  and  St. 
A'incent,  in  ir>()  to  (111  fathoms,  are  erj'oneously  referred  by  Mr.  Dall  to 
this  species.     Our  shell  is  certain!^'  n(»t  a  Mnontrn. 

We  have  a  fragment  of  a  left  valve  from  station  L*(;5a,  N.  lat.  "21^  2'J', 
W.  long.  78"  7'  30",  in  338  fathoms,  found  among  l"'oraniinifera,  which 
belongs  to  a  strongly  undulated  species,  with  a,  short,  angular,  sub- 
a(;nte  rostrum  deliiUMl  below  by  a  rather  deep  groove  at  which  the 
concentric  sculpture  changes  abruptly.  The  beak  is  i)rominent  and 
turns  strongly  backward.  Tln^  cartilage-plate  is  strong,  deeply  eon- 
cave,  and  directed  backwar<l;  a  moderately  elevated  internal  rib  runs 
backward  from  the  umbonal  region  [o  the  posterior  uiuscular  scar. 
The  shell  is  thin  and  has  deep  internal  grooves  corres])onding  to  tlu^ 
extei'iial  ridges.  Judging  by  the  lines  ot'  growth,  the  shell  was  short- 
ovate,  broadly  rounded  anteriorly,  and  having  posteriorly  a  siu)rt, 
angular,  subacute  rostrum;  tlu^  escutcheon  is  concave  and  well-<l(?(in(ul 
by  a  small,  sharp  ridge.  This  fragnu-nt  seems  to  belong  to  an  unde- 
scribed  s{)ecies  of  Mjionern.  It  can,  however,  hardly  be  the  sann*  as 
Mr.  DalPs  species,  as  he  states  tluit  in  his  "there  is  no  buttress  or 
ai  ;*earance  of  an  internal  rib.*' 


Bull.  Mils,  Coiiip.  Zo.ll,,  Xir.  p.  2!)2,  ISSfi;  XVIIT,  p.  Ill,  J889. 


I 


NO.  1139.  i)i:i:i'-i\'.rn:i!  i/o/./, r>r./- 17; /,7.7/./,  .ixn  1:1  s/f.  7119 

CUSPIDARIA  LAMKLLOSA  iM.  Sars  i  Dall. 
O'l.itc  lAXIV,  lii;.  10.) 

.\ '<■(()•(/  hiiiiclhiad  \i;i;i;il.i..  I'r.ins.  Coiiii.  Acuil.,  \',  \i.  ."idl,  ISM';  \  1,  p.  ■J~~,  pi.  x\  \, 
liii.  '■'>,  ISSI;  lOxpl.  Alhatiosn,  Ii'eport  l'.  8.  ('lUii.  I'i^li  mid  I  isluiio  loi  is.s::, 
p.  571,  iss:.. 

('ii>ij)i<liiriii  Uihifllimi  l>.\i,l,,  I'.iill.  Mils.  Cump.  /.(xU.,  XII,  p.  L'!U,  ISMl;  Uiill.  U.S. 
N:it.  Mus.,  No.  ;{?.  II.  (■>(!,  111.  \l.\  ,  liu.  :5,  ISS!t. 

Coniparativi'ly  tew  speciiutMis.  at  twelve  .stations,  l)et\v('eii  X.  hit.  4<i 
L"  li>",  W.  loiij,'.  OS'  ]!)',  and  N.  lat.  .'57  '  M'  ;j(>",  W.  Ion-.  T.'.     IS'    10  ', 
in  ;n!»  to  ."i.M  fathoms,  ISSO-ISSO. 

A  lew  specimens  occiiiii'd  whicii  (lilVei'  from  tlie  typical  loiin  in  liav 
ing  Imt  live  or  si.K  eoncentrie  lamelhe   \isil)le  on  the  antcro  venli'al 
lioition  (if  each  valve  and  only  conspicuous  une(puil  lines  of  <;rowth  on 
the  rest  of  the  surface. 

CUSPIDARIA  TURGIDA,  new  species. 


(I'latcs  I,.\XII.  Ii^^  7;   L.X.WII.  lii;.  I.) 

Shell  rather  l'ar<;e,  thin,  delicate,  translucent,  of  a  pinkish  white 
color  within,  lon^-oval,  with  ]>rominent,  posteriorly  dir<'ctcd  umlios,  and 
narrow,  rather  lon<i'  jiosteriitr  rostrum.  The  beaks  arc  central,  rather 
acute  and  turned  distinctly  forward.  The  antcro dorsal  marjiin  is 
slij.litly  convex,  formiiiii'  a  l>roa<l  curve;  the  anterior  end  is  a  little 
])rolonji»'d  in  the  ndddle  l)ut  otheiwise  ju'ctty  evenly  rounded;  the 
veidral  marj^in  forms  a  rej;ular.  broad  curve  becomiii,u'  stroii<j;ly  iiicm  Vi'tl 
at  the  base  of  the  rostrum;  the  postci'o  (btrsal  mar.irin  is  strai;;lit  at 
first,  l)iit  slij;litiy  concave  alonjn"  the  rostrum.  Tlie  cartilaj^e  plate  is 
small  and  very  obli(jue,  and  in  the  riulit  \  alve,  is  separated  l>y  a  dis- 
tinct notch  from  tht>  lateral  tooth,  which  is  long  and  low,  with  a 
rounded  summit  ami  a  long,  gradual,  posterior  slope;  there  is  no  trace 
of  buttress  oi-  clavicle.  In  the  lett  valve  the  hinge  margin  is  thin,  and 
nearly  simide  both  anteriorly  and  posteriorly.  The  exterior  surface  is 
<!overed  with  a  thin,  yellowish  gray  ei»idermis  and  is  marked  with 
irregular,  rather  conspicuous  lines  of  growth  ;  on  the  lostrum  there  is  a 
distinct  diagonal  ridge  running  iVom  the  b(»aks  to  the  lower  margin. 

Length,  L*L*  mm.;  heigid,  1-  mm.;  breadth,  11  nun.;  distance  Ironi  (^eii 
ter  (d"  beak  to  end  of  rosti'um,  115  mm. ;  to  extreme  anterior  end,  IL'  mm. 

In  <brin,  general  ai>pearanee,  and  length  of  rostrum,  this  s|>eeie.s  is 
iidermediat«'  between  (\  iflarinlis  and  (\  ro.slrata,  but  the  umbos  arc 
mote  obIi(pie  and  there  are  obvious  diifcrclu;(^s  in  the  hinge. 

One  live  specimen  (No.  7S78!)),  station  L'7U,  N.  lat.  .'58^  2L",  W.  long. 
TOO  17/  30/'^  ill  i,.S2.j  fathoms,  1S8G. 


800 


ri:(ifi:i:i)i  \':s  or  rni:  \.t  rn>.\  u.  mi  sriM. 


\  111  .  \  K. 


NO.  I 


CUSPIDAKIA   KOSTRATA  (Spengler)  Dall. 

(Thitr   l.Wll.  li;;.  i\.) 

Xviiid  ronlralit  X'Kiiuii.i..  'rraiis.  Coiiii.  Aciil.,  \'.  p.  "'ti-.  |il.  i.viii.  Ii,;;.;>!',  ISSL>;  \T, 
p.  I'TT,  ISSJ;  l',\|il.  AllKilriins.  li'cport  I'.  S.  ('(Hii.  I'i>li  .iiid  I'islunics  tor  ISM!, 
1>.  574.  l)^sr>. — S.Mrni,  I'..  A.,  K't-port  \'o.\ .  (IkiIIi  micr.  '/.ni'A.  I,:iiiicllilir,iiiclii,ita, 
X!l.  i».  ;!.").  iis^^r.. 

CimpidHriarostiatu  l».\i.i,.  I'liill.  Miis.  (Oinp. /.o<il..  Ml,  p.  i.".M.  Lssil;  Will,  p.  Ill, 
18S!t;  Hull.  IT.  S.  Nal.  Mils..  Xo.liT.  p.  •!»'..  ISSM.— l.oi  .\1!1).  Caiiipii.uiitMlii  r«(((/r(//, 
.\iiMalcs  (Ic  ITiiivcisiti'  (Ic  l.yoii.  p.  177.  \x'M. 

Tliis  si)e('ic.s  was  (»l)tiiiiM'(l  iit  about  filtcen  stations  between  N.  Int. 
40  (i'  .")(>",  \V.  loni;'.  7(1  :'A'  I.">",  and  X.  lat.  .".s-  ;?]'.  W.  loiiu'.  7::  21', 
ill  (m  to  {'}(>  tathoins,    Soutli  to  r)arl»a(los  in  ('>'>  to  l.O,')!!  latlioiiis. —  Dall. 


Til 

wl 

('1< 

liol 
ca 

(Mil 

all 


CUSPIDARIA   uLACIALIS  (G.  O.  Sarsi   Dall. 
O'laUvs  L.WI.   lio.  H;   J. Will.  li-.  ."- :    l.XW  .  H;;-.  !l.) 

Xeiini  (ihtridlix  G.  <).  .'<Ai;>.  .Molliisca  Kcii.  Arctica'  Norvcuia',  [).  S.'>v.  jil.  (>,  liuH. 
8,  a-c,  1S7S. — Viatiai-i..  Trans.  Coiiii.  Acad..  V.  ]i.  5(11.',  pi.  xi.iv.  liiis.  10.  n-li, 
188-';  \\.  \).  -77,  ISSj;  I;n].1.  Allxtlroy-^.  I.V'port  I'.  S.  Cnin.Fisli  and  i'islicrie.s 
for  iss;!.  ](.  .">7I.  l.S.^,'.. — Smith,  1',.  .v..  i.'c]Kiri  NOy.  Challciuiiy.  '/.n\\\.  LaimJli- 
liraiiclii.'ita,  .Mil,  p.  11.'),  ls.'-^.">. 

Ciiniiidiirid  (ilacidlis  Paii.  I!ii1I.  Miis.  (  diiip. /uc'd..  .\I1.  jip.  L'!tl.  ;>();!,  iSMfl;  jinU, 
r.  S.  Nat.  Mu    .  No.  :i7.  p.  (i(i.  issn. 

Ciispidaria  nrctica  \ar.  <ihi<\iiVin  D.si.i,,  liiill.  Mils.  Comp.  Zo.;!.,  .Will.  p.  Ill, 
1889;  Vvw.  V.  S.Nat.  Miis.,  .Ml.  j).  I'su,  issii. 

Ciixit'uhvw  iiUtrlallH  lUsil.  Hull.  Mils.  Coiiip.  VauA..  .\.\111.  ji.  L'l't;.   l.s'i:;. 

Not  Cnxplddyia  arlira  (M.  S\i;>i. 

This  very  coiiunoii  spcM'ics  was  dnMljicd  at  many  stations  from  X,  lat. 
41^  L>»;'.  W.  loiio-.  (i-J-  10',  to  X.  lat.  .'!7^  n'',  \V.  Ion.!--.  74  ;!;5',  in  (il'  to  Sl'S 
t'athoiiis.     ►South  to  the  (Jiilt'of  Me.\ic«»,  in  01  to  1,407  lathoius. — Dall. 


CUSPIDARIA   MEDIA,  new  species. 
(I'latis  1,.\.M.  I'ms.  .-..  (1;   L.X.MII,  ^l^^  t!.^ 

Shell  ol' nioderat(>  size,  rescniblini;-  a  mediuui  sized  (\  f/hiridlis  (Sai's), 
in  fonn,  but  decidedly  more  swollen,  with  tiie  rostrum  nari'ower  and 
more  distinctly  delined  by  a  stron_o<'r  ventral  emarj:ination.  I'mbos 
lar^e,  prominent,  and  swollen,  with  stronj^ly  iiienrved  and  very  [)romi- 
neiit  beaks.  The  aiitero dorsal  margin  is  a  little  eonve.x;  and  .slojies 
rii]»idl.\'  to  the  evenly  rounded  anterior  md  ;  the  ventral  inarj^in  is  rejiii- 
larly  curved  and  is  rather  more  e(»iive.\;  than  in  ('.  (ilddali.s.  ;ind  shows 
a  vi'iy  deei<le(l  emarjiination  at  the  l);ise  of  tlie  rostrum;  the  postero- 
dorsal  margin  is  nearly  strai.uht  but  slopes  from  the  beak  to  tlio  end  of 
the  rostrum  which  is  of  moderate  len.uth  and  tapers  from  the  base  to 
the  iiari'ow,  subtruiicated  end;  it  has  no  distinct  dia,U()nal  ridj^e,  but  is 
separated  from  the  body  of  the  shell  by  a.  stronjuly  marlced  dei)ression. 
The  surface  is  nearlv  smooth  but  is  covered  with  lini'  lines  of  orowlh 


NO.  1139. 


DEKi'-w ATi:n  Moi.uscA—vEinni.i.  A.\n  iiisji. 


801 


wliicli  are  most  distinct  on  the  rostrum.  The  liinjjfe  inarjjin  is  thin. 
The  riyht  valve  lias  a  thin,  low.  much  elongated  ]M)sterior  lateral  tooth 
which  runs  nearly  parallel  with  tlu;  dorsal  margin,  .ibove  which  it  luo- 
Jects  in  a  hroad  curve;  tlie  eartila<ie-])late  is  small,  very  oblique,  and 
closely  united  with  the  tooth  from  which  it  is  separated  by  a  faint,  curved 
notch;  no  liuttress.  In  the  left  valve  there  is  no  lateral  tooth,  and  the 
cartilam'  plate  is  very  small,  slightly  prominent,  with  a  <'urve(l  inner 
ed.iie.  The  inner  surface  of  the  shell  is  smooth  and  the  muscular  sears 
are  faint. 

Len<;th  of  au  average  specimen,  K!  mm.;  height,  8  mm.;  breadth,  (J.5 
mm.;  beak  to  end  of  lostrum,  S..")  mm.;  bealc  to  anterior  end,  <!  mm. 

This  species  is  allied  to  <'.  (ihtcialis,  from  which  it  differs  in  its  more 
swollen  foiin,  moi'e  obli(pie  anterior  end.  more  prominent  ventral  m  ir- 
gin,  more  clearly  delined  rostrum,  and  striiighter  postero  dorsal  margin. 
The  hinge  shows  still  more  declde<l  dilferences;  the  lateral  tooth  of 'he 
latter  is  stouti-r,  more  prominent,  and  less  jn'olonged;  the  cartilage- 
plate  is  smaller  and  less  distinctly  deline<l.  From  C.fraterna  it  dilVers 
in  being  less  ])rodnced  ventrally  and  in  having  a  longer  rostrum  with 
much  straighter  dorsal  margin  and  a  m;;..ii  longer  lateral  tooth. 

This  is  a  cctmmon  species  olf  Marthas  Vineyard  and  has  been  taken 
at  about  tifteen  stations  between  X,  hit.  KP  10'  15''.  W.  long.  70^  I'l;', 
and  N.  hit.  a!)^  ">(;'.  \V.  long.  70^  51'  IS",  in  03  to  155  fathoms.  188(>-1,SS4. 
A  Itroken  valve,  station  ;u;2,  X.  hit,  12^  1',  W.  long.  (IK"^  31',  in  10(5 
latlioms,  1870,  is  also  referred  to  this  species. 


CUSPIDARIA  PARVA.  new  species. 


(I'liU.s  L.WIV.  lin.  !):   UXWII.  lijr.  7.) 

Shell  small,  (ieli(;ate,  elongated,  inei|uivalved,  having  a  general  resem- 
blance in  form  to  tin*  very  young  of  ('.  ohcsn  and  (\  frntcrna.  I'mbos 
small,  ratliei' prominent;  beaks  similland  incurved.  The  ant«'ro  dorsal 
niaigin  is  moderately  t'onvexand  slopes  regularly  to  the e\'enly  rounded 
anterior  end;  ventral  margin  very  broadly  rounded,  with  a  decided 
incurvature  at  the  base  of  the  rostrum,  corresponding  to  the  marked 
dei»ression  of  the  surface;  posterodorsal  margin  slo[)es  ra[»idly  at 
tirst  and  is  usually  concave  along  the  rostrum,  which  is  modt'rately 
long  (the  length  Naiies  in  dilferent  specimens),  narrow,  with  an  obtusely 
rounded  or  subtruiu-ated  end.  It  is  crossed  by  a  distinct  diagonal 
lidge,  above  which  there  are  several  small,  raised,  ra<lial  liiu's;  the 
surfaite  is  elsewhere  nearly  smooth  or  presents  a  micr()scoi»ic,  faintly 
granulose  a))pearance.  The  left  valvt;  is  the  larger  and  considerably 
overlai)s  the  right  along  the  ^'entral  margin  ami  siphonul  region;  the 
right  overlaps  the  left  along  the  jxistero  (husal  margin;  the  rostrum 
is  a  little  bent  toward  the  left  in  some  specimens.  The  hinge-margin  is 
delicate,  with  the  anterior  margin  a  little  everted;  <'artilage  i)late 
minute,  sunken,  in  the  right  valve  well  separated  from  the  i»rominent, 
l*roc.  N.  M.  vol.  XX 51 


802 


rnnciJEDTXas  of  tui:  x.iTrnx.iL  museum. 


VOL.  XX. 


rather  olonj^atod  liitcral  tootli ;  tlie  left  viilvc  also  liiis  a  small,  clonjiatod, 
tootli-liki!  e\i)iiiision  posterior  to  the  eartilaj^e  plate. 

Len,utli,  l.."»  iiiMi.;  liei.uht,  LM'.")  iiiiii.;  breadth,  l..~)  imii. 

Tliis  species  may  easily  be  mistalcen  for  the  yoini.y  of  (J.  <>hrs((  and  C. 
ffdtcnid;  the  .structure  of  the  hiiiye  is,  ho\v<'ver.  eliaracteiistic. 

A  eomparatively  few  specimens,  at  seven  station,  between  N.  hit. 
41°  2S'  30",  W.  lon<;-.  (m^  35'  30",  and  350  .j((/  ;;()//^  W.  haiy.  71-  31'  45", 
in  515  to  1,200  fathoms,  1S83-18S(>. 

CUSPIDARIA  VENTRICOSA.  new  species. 


(Plates  L.WII,  live.  ■'■■    i.XXVI.  ti.>r.  (i.) 

Shell  lar.n(>,  rather  solid,  swollen,  with  a  \«'ntral  enlarjicment  and  a 
moderately  elon,iiated,  tajjered  rostrum.  Umbos  swollen  and  promi- 
nent; beaks  incurved.  Antero-dorsal  maryiii  at  lirst  nearly  str a ij;ht, 
then  broadly  rounded  with  the  extreme  anterior  end  a  little  prominent; 
ventral  niarjiin  decidedly  exeurved  in  the  middle,  corresponding  to  the 
exterior  swellini;';  at  the  base  of  the  rostrum  sliiihtly  concave;  ]iostero- 
dorsal  marj^in  somewhat  concave,  the  most  so  at  the  base  of  the  ros- 
trum, which  is  obtusely  ronnded  at  th(>  eiul.  Exterior  covered  Avith  very 
distinct  lines  of  growth  and  irri'yular,  stronger,  concentric  jii'ooves. 
C  :  the  ]'ostrum  there  is  an  obtuse,  diaj^onal  rid<;e  running  to  the  ven- 
tr.'.  auj^le  of  the  tip;  between  this  and  (luMlorsal  maryiii  there  are  two 
otheis  less  distinct.  Tin;  ant<'rior  hin^e  iMaij.;in  is  decidedly  thickened 
in  both  valves  and  ])rojects  inward  with  a  thick,  rounded  edj^e,  most 
eon.spicuous  in  the  iij;ht  valve,  in  whicii  it  is  abru])tly  much  narrowed 
near  the  cartilage-plate;  in  this  valve  t]ie  lateral  tooth  is  short,  stour, 
obtuse,  very  ])ronunent.  and  situated  close  to  the  beak,  its  length  along 
the  margin  not  inuch  exceeding  its  height;  cartilage-plate  small,  rela- 
tively wide,  obliipie,  directed  backwanl  and  downward,  and  closely 
united  to  the  lateral  tooth,  there  being  only  a  slight,  i-ountled  notch 
between. 

Length  of  the  larger  s])ecimen,  30  mm.;  height.  L'9  mm.;  brea<lth,18 
mm.;  beak  to  end  of  rostrum.  10  mm.;  beak  to  anterior  end,  17  mm. 
Another  specimen  is  '25  mm.  long;  17  mm.  high;  lU  mm.  broad. 

Four  valves,  at  three  station,  between  N.  hit.  10"^  L'O',  W.  long. (iO^  1', 
and  N.  hit.  38°  21'  30",  W.  long.  70°  51'  30",  in  340  to  1,700  fathoms, 
188L*-188(). 

This  si)ecies  has  some  resemblance  to  C.  (il<(ci<(lis,hut\s  a  stouter  and 
liKH'e  swollen  shell,  with  a  relatively  larger  rostrnm,  much  more  elon- 
gated and  less  prt)minent  lateral  tooth,  and  very  different  cartilage- 
plate.  The  latter  does  not  have,  the  swollen  ventral  region,  character- 
istic of  our  speciesj  nor  the  diagonal  ril)s  on  the  rostrum. 


NO.  IKiO. 


DEKr-WATKU  Mor.Lrsf'A—vEHRir.L  jxi)  insn. 


803 


CUSPIDARIA  ARCTICA  (M.  Sars)  Dall. 

(I'lalcs   I.XXI,   li-.  L';    I, WIN',   li;r.  7.) 

\((rr(i  iirctica  Sahs,  (i.  <>..    MolluMCii  R<(^.  Anti(;i'  NOrvoj^i:!',  p.  sr>,  |il.  C.  tlrs.  5, 
(t-c,  l!^78.— S.-Ninir,  K.  A.,  K'r])(irt  X'oy.  CludUiiiicr,   /.ik;!.    I.;unclli1>r;nicliiatii, 

XIII,  !>. :;.-.,  iHsf). 

('uspidiiiiii  (irrli((t.  D.vi.i.,  Hull.  .Mii>.  Coiiiip.  /.'>"'•,  XII.  p.  -i'l,  iNSii. 
\i)t  Xciira  Hrclicd  \  i,i;i;iM.  Aiiht.  .luiirii.  .'<imi'M(  c,  \I.  ]i.  ltd,  |s7;i. 

A  siii.iilc  inii»erl('ft  Viil\e  IVdiii  station  7(»,  soutli  of  llaliliix,  Xova 
Scotia,  ill  V.Hi  fatlioiiKs,  is  i'el'<Ti'('(l  to  this  sju'cics.  Tliou,iiii  worn  and 
slijilitly  broken,  it  a<ire('S(;loSL']y  witli  Sars'  li<;iir(',  Itiit  it  cannot  be  lully 
grown,  for  it  nieiisiires  l)nt  II  mm.  in  lcn<;tli  and  II  mm.  in  height. 

CUSPIDARIA   l-^ORMOSA,  new  species. 
(I'lalfs  I.\XI\-,  liu-.  (5;    1,.\.\1.\.  lit;.  ;i.) 

Slicll  short,  high,  and  swdlleii.  I'mbos  piomincnt;  boaics  incurved. 
Anterior  ]toition  broadly  ronn(hMi.  a  little  produced  at  tiie  end,  with  the 
dorsal  maigin  conxcx  and  a  little  excurved;  the  vi-ntral  margin  is 
broadly  and  evenly  rounded  ;  the  rostrum  is  short,  bioad  at  base,  much 
ta])ered;  the  ])ostero  (b)rsal  margin  is  nearly  stiaiglit  at  lirst,  then 
slightly  concavii  and  a  little  u]»turned.  The  exterior  is  covered  with 
uneven  lines  of  gi'owth  hetween  which  the  surface  is  nucroscopically 
striated  and  more  or  less  iridescent.  The  color  of  the  single  specimen 
is  pale  pink,  externally  and  intermilly.  The  light  Nahc  has  a  promi- 
nent, triangular  lateral  tooth  with  its  base  prolonged  parallel  to  the 
margin  of  the  shell ;  it  isseparate(l  by  a  decided  notch  from  the  cartilage- 
plate,  which  is  of  moderate  size,  ovate,  somewhat  obliipu',  with  its  inner 
edge  rounded  and  prominent. 

Length,  aV)ont  ]()  mm.:  height,  1.!  mm.:  breadth,  l(»mm.;  beak  to  end 
of  rostrum,  about  '.>  mm.:  beak  to  anterior  end,  8  mm. 

A  single,  much  broken,  specimen  (No.  7S;>ll>).  station  L'TOfJ,  N.  hit.  IP 
28',  \V.  long.  (».")'  ;>,■)'.  in  1,188  fathoms,  188(1. 


(  1 


CUSPIDARIA   FRATERNA,  new  species. 
(IMiitc^  I.XXI.  lius.  7.  S;  l.XXW  iij;.  <'.^ 

Shell  similar  to  ('iisjtidKria  obaui  (liovt'iij,  moderately  large,  consider- 
ably swollen,  rather  tiiick  and  lirm  for  the  genus,  with  a  moderately 
long,  tapered  rostrum.  The  umbos  are  jather  prominent  and  swollen, 
with  the  strongly  incurved  beaks  nearly  in  contact.  The  anterior  end 
is  broadly  rounded  with  a  regularly  curved.  coii\('\  dorsal  ('A\xi'  which 
rises  nearly  to  the  height  of  the  umbos;  tiie  ventral  margin  is  a  little 
protuberant.  'J'he  i)ostero-dorsal  line  slopes  with  a  slightly  concave 
ontliiu^  to  the  end  of  the  rostrum  ;  on  the  \  entral  margin  there  is  a  (lis- 
tiuct  incurvature  corresponding  to  a  wave-like  depression  on  the  surface, 


804 


rRnrr-rnixcs  or  rni:  s  \rinx.\r.  visff^f. 


vol,   XX. 


(U'liiiiiin  tlif  Icisc  of  the  lost luiii.  The  siiirjicc  is  iicafly  siiioot li  and 
sdiiicwliiil  flossy.  coNrnMl  with  line  liin-s  ol"  ••tow  th  w  hicli  hccdiiic  iiiuri' 
proiiiiiiciil  and  iri«',i:uhii' on  (he  lostruni.  which  lias  no  distinct  diauonal 
line.  The  liini-c  niaij^-in  is  somewhat  thickened:  thi!  iii;lit  \al\'e  lias  ii 
I'at her  short,  prominent,  ohtnse,  friiui.ynlar  lateral  tooth  only  slij^htly 
se])Jirated  from  tiic  <'art ilajic-iihite  by  a  concave  margin:  tlie  cartilaj^e- 
plati'  is  snnili.  \ ciy  oidi(|ne,  with  the  innci' ediic  curved  and  not  at  all 
nn.iinlated.     Muscular  scars  and  pallial  line  indistinct  ;  no  buttress. 

I>en<ith,  !.">  mm.:  height,  !*  mm. :  breadth.  «I  inm. :  from  beak  to  end 
of  rostiiim.  S  mm.;   from  beak  to  anterior  end.  7  nun. 

l'"onnd  at  about  thirty  stations  between  N.  hit.  10  i"  4!»",  W.  lonjj^. 
dS"  1!»',  and  X.  lat.  .".T    L'.".'.  W.  Ion-'.  T.T'  XV.  in  AU'J  to  US  I  fatlionis. 

This  species  rescnd)les  ('.  ulnsK  (Lovt'-n)  in  form;  it  is,  however,  a 
larj^er  species  with  a  liiiuerand  more  swollen  shell:  the  ventral  uuiriiiu 
is  more  prominent,  so  that  it  has  a  relatively  hi,iiher  form  and  is  broader 
at  the  base  of  the  rostrum,  'i'he  liiii.ue  shows  more  decide<l  dil1'ereiu*es, 
for  in  ('.  oJicsd  the  lateral  tooth  is  smallei',  shorter,  and  closely  approxi- 
mated to  the  cartilage  plate  which  is  distinctly  an^iilated.  the  inner 
end  licin.o-  acute  and  separated  from  the  tooth  i)y  a  small  angular 
notch. 

CUSPIDARIA    OBESA    Lovf       Dall. 

(I'l;itr  i.XW.  li.i;.  7.) 


h 


Xciira  olivxa  I.oxi'n,  lud.  Moll.  Sciuitl.  Occitl.,  ji.  IS,  1S16. — \'kui!Ii.i,,  'I'nniH. 
Coini.  Ai:ni..  N,  p. ;".(;;{,  ]i  I.  \  [,i\ ,  li^,  Idc,  1SS2:  ^■l.  ]>.  L'TT.  I.SSI  (iiiiiMit):  llx].!. 
.Ilhfitruxx,  K'l'porl  1'.  S.  Coin.  I'isli  iiiid  l-'isiicrics  fof  1SS;{,  |).  "iTI,  ISS")  (in 
part). — SMrrn,  K.  A.,  i>fiiort  \'o>  .  Chdlldnji  r,  '/ah'A.  Laiiiclliljiaiii'liiata.  XIII, 

]).  r.i,  \xs:>. 

Ciixpidiirid  (till  sti  \K\l.l..  ISiill.    .Mus.    (diiip.    /oiil..    \1I,   p.  !.';».">(  not  pi.  Ill,  fig.  1 ), 

is8(i:  Hull.  I'.  S.  Nat.  .Mu.s.,  No.  ;>",  )>.  (IC  (not  pi,  iii.  W'^.  1),  ISMl. 
Not  Xt'ii  rti  iivlliicidd  SriMl'soN. 

This  species  has  been  found  at  about  twenty-four  stations  between  N. 
lat.  4;P2;}',  W.  louo-,(;8  ;?()',  and  N.  lat.  .{o  IL"  10",  W.  long.  TPoT'l.V, 
in  !M;to.Sll  fathoms,  1S7;5-1SS7. 

it  is  recorded  by  ^Mr.  Dall  from  off  Barbados  in  1(10  fathoms  and  off 
tlu!  coast  of  Calitbrnia  in  1(!  fathoms. 

After  a  ci'reful  stmly  ami  (Munparison  ot"  the  numerous  species 
belonomg  to  the  family  Cuspidarida-  mc  have  been  able  to  satisfac- 
torily prove  that  the  form  des(;ribed  by  Stimj)son  as  Xcant  jtvUiiciiUi  is 
<|uite  distinct  from  that  described  by  Loven  as  ^V.  obcua,  with  which  it 
has  been  so  lono-  confounded. 


If 


No.  ii:m 


ui:i:i'-n.\ri:i!  Moi.i.rsc.i—vF.inui.i.  .i\n  i:i  sn. 


SO." 


XIII, 


c.  1), 


, 


CUSPIDARIA   PELLUCIDA  (Stimpson). 
n'li.trs  l,.\w.  I'm-,  s:  i.xwi.  liii.  s.i 
Xtirni  pcnnciilii  SiiMi'SDS.   Imcrt.  <iImii(1    M:iii;m.    ]>.   'Jl.  jil.   i.    ti;;;.    i;;,    ]sy.',. — 

(iol'I.K,     Iint'lt.     Mas>;;i(liiisct  Is    il'il    cd.  1,     p.     (il.     \\\x.    '.'>~S,     IS7t>,--\'i:i;K(|,l., 

Clieck-list,  11.  L'l,  IMIi. 
.V((;)((  sp.  \'i:i;l!il,l..  l"-\|il.   .Illiiilrnsn,   K'rpoil    I'.S.  ('diii.    I'Kli   Mini    I'i^lnrics   lor 

iss:;,  p.  r.Tl.  iss:,. 

Not  .\V(M(/  ohrmi  L()\  I's'. 

Shell  small,  imicli  s\V(»llt'ii,  witli  a  strongly  taiM-rcd.  soiiicw  lial  pro 
(liK't'd  rostnini.  I'liiltos  iclatixcly  laij^c  ami  proiuiiiciil.  licalxs  iiiiniitc, 
stroiijily  incurved,  'i'lie  anterior  port  ion  is  lo'oadly  and  evenly  loiinded, 
tlic  iiiai\uin  lorinin;;'  lu'arly  a  seniieirele.  w  itii  the  dorsal  margin  utronj^ly 
eoiivex  and  cxenrved,  risinu'  nearly  as  hi^h  as  the  und)()s:  tlic  ventral 
iiiar.uin  is  lu'oadly  rounded  i»iit  distinctly  incurved  at  the  base  of  I  In- 
rostrum  which  is  rather  inurow  distally,  obtusely  lounded  at  thetiii 
and  slightly  uptuiiuMl:  the  posteri*  dorsal  iiiai<iin  slopes  considerably, 
is  nearly  straiju'ht  at.  lirst  but  becomes  slight ly  couca\('on  the  rostrum. 
l"'xternal  surface  uearlx'  smooth  but  usually  showin^u'  more  or  less  prom- 
iiH'ut  lines  ot'  orowth,  most  distinct  on  the  distal  part  of  the  rostrum 
which  is  destitute  of  il  distinct  dia,L:()nal  line.  The  ri,L;ht  \  alve  has  a 
short,  ver,\'  ])rominent.  stioii^ly  curved  lateral  tootli  risiui; close  to  the 
beak,  the  most  prominent  part  Iteing'  near  the  proximal  end  wliicli  rises 
rather  al>ruptly  IVoui  the  very  minute  cartilaj^e  jdate  from  which  it  is 
not  separated  by  a  notch;  Just  in  front  of  the  beak,  the  hinjic-marj^iii 
is  distinctly  thickened,  sinuous,  and  a  little  ])rominent.  forming  a  sort 
of  tooth,  separated  from  the  lateral  tooth  only  by  the  minute  sunken 
cartila'''e-i)late:  the  lett  valve  also  has  a  slight,  sinuous  tliickeniiig  ot 
the  margin  in  I'ront  of  the  cartilage  ])lale. 

Length  (d"  one  of  tlii'  largest  s]»ecimeus,  1.5  mm.;  height,  .">  mm.: 
breadth,  .'>  mm.;  beak  to  end  of  rostrum.  .'!  mm.;  beak  to  anterior  end, 
2..")  mm. 

This  spe<'ies  has  been  taken  at  I'astport  Harbor;  Hay  of  I''und\-,  near 
(Irand  INlanan  Island:  ami  at  about  twenty  one  stations  l»et\veen  N. 
hit.  47^-1(1',  W.  long.  17  ;;.")';;(►'.  an<l  N.  lat.  :\r>  ll'i'O  ,  \V.  long. 
74"  nO'  10",  in  r>2  to  .".Kl  fathoms,  ISdS-ls.Sd. 

The  specimens  here  described  are  from  the  r»ay  of  I'un<ly,  wo-.n 
drand  Manan  Island  and  ICastport  Ilailtor,  very  near  the  locality 
where  Doctor  Stimpson's  tyi)es  were  obtained.  In  formei'  ai tides  we 
have  united  this  species  with  C.  ohcsd  (Lo\(''n).  A  careful  reexani 
ination  of  a  large  series  of  sitecimens  of  both  forms  has  convinced  us 
that  they  are  distinct  but  closely  related  species.  In  (',  ohcsa  the 
anterior  portion  is  more  i)roduced,  giving  the  shell  a  more  ovate  out 
line;  the  rostrum  is  broader  and  latlier  moic  upturned;  the  cartilage- 
])late  is  relativ(dy  much  larger,  moie  jtrondnent.  and  angular  at  the 
edge,  and  in  the  right  valve  is  separated  from  the  lateral  tooth  by  iin 


8on 


ri;i>(j:i:i)i\(is  or  riir:  x.rnox.ir.  vrx/v  ^r. 


It..  \s. 


iiii;.;iil;ii'   iMttcli;    wiiilr    tlic  toolli   itself  i.s  rt'lutivclv   .--iiiiillcr.  .slioitcr, 
less  proiiiiiM'iit.  and  mort!  distinctly  ti!;tnyiiliir  in  Ibi  ni, 

CUSPIDARIA  SUBTORTA  fSars). 

(I'l.iic.'*  L.WIII,  li-.  1:   l.X.MV,  tius.  I.  :..) 

\f<ir(i  niihli>rlii  i^M;^,  (i.  i>.,  ,Miillii>(;i  K'ci;.  Arctici'  \i>r\  o;;iii',  ]».  ST.  ]>].  (i,  lius. 
(),«-(',  187S. — .Iki  KitKvs,  Ann.  .M:i,u-.  Nat.  Hist..  ]>.  UIM,  Soiitcniln'r,  ls77:  I'lnc. 
Zo(>l.  Sor..  L()n('<in.  ]).  !t;i7.  XovcnibiT.  liSSl. — Smith,  E.  A..  IJeport  ^'oy.  (hal- 
Ifuijiv,  Zoi'il.  I.ani(>lli)ii':in('1iiiitii.  XI  IT,  p.  )>.">,  ISS.". 

Shell  ino(|iiivalv<',  ratlior  short,  relatively  hi<;h.  niiich  swollen  in  the 
middle,  with  liiiiiid  umbos  and  a  short,  tapered,  somewhat  upturned 
rostrum.  The  anterior  ])ortion  is  broadly  lounded,  the  mar.uin  Ibrnnnii' 
nearly  a  semicircle;  the  antero doisal  marji'in  is  st roii.^ly  coiix'cx  and 
sliji'htly  excurved;  the  ventral  margin  is  e\tMily  rounded,  except  at 
the  base  of  the  rostrum  wlu're  it  is  distinctly  incurxcd,  especially  in 
the  riiiht  \alve5  the  ])ostei'o dorsal  margin  is  \'ery  strongly  conca\e  in 
the  lel't  valve  an<l  less  so  in  the  riiilit.  The  rostrum  is  sei)araled  from 
the  body  of  the  shell  by  a  sinuous  depression  and  has  a  ])0(»rly  deline(l 
diaji'onal  ridu'c:  it  is  a  lit  tie  bent  to  the  left  and.  wheu  viewed  from  al)ove, 
ai)i»ears  slightly  twisted.  The  surface  of  the  shell  is  neaily  smooth, 
but  shows  distinct  liiu's  ol*  urowtli  anteriorly,  and  especially  on  the 
supei'ior  jiart  (tf  the  rostrum;  the  epidei'mis  is  very  thin,  yellowish 
white,  more  or  less  wrinkled  on  the  rostrum;  the  hinjie-marjiin  is  rather 
stronji':  the  lateral  tooth  in  the  ri.!.:ht  valve  is  larji'e,  rather  elon<;ate(l, 
rather  ])rominent,  obtusely  triaiijiular.  and  not  .separated  from  the  very 
snuill,  narrow,  obli(iue,  sunken  cartilage  plate  by  a  uotch:  in  the  left 
valve  there  is  a  small,  short,  prondneut  tooth  arising  from  the  ])oste- 
rior  mariniu  of  the  cartila,n(^-plate  and  separated  from  the  posteiior 
hin^('-mar<iin  by  a  distinct  an.iiular  uotch. 

Len<;tli,  S  mm.;  hei,nht,  0  uim.;  breadth,  about  ~>  mm. 

One  live  specimen  (No.  ."ilT)!.".),  station  LM!»'.),  >;.  hit.  Iio  l(i'  .!(>  ",  VV. 
]onj>-.  r.l)^  r>.V  4r.",  in  i;5()  fathoms,  ISSo. 

This  species  api)ears  to  be  identical  with  the  l'".uro])ean  sithinrttt.  It 
differs  from  all  of  our  other  sjtecies  in  having  a  distinct  tooth-like 
tubercle  behind  the  cartilas't'phite  in  the  lettvahc.  Tlu^  inequality 
of  the  valves  and  the  twisted  rostrum  <ii\e  tlu^  shell  a  ])eculiar  aspect. 


ik 


CARDIOMYA  ABYSSICOLA.  new  species. 
(I'latcs  I.XXIll.  liii.  .1:   1,\MV,  li;;.  1;  LXX\'II,  lij;-.  H.) 

Shell ratluM'lariiC.  sw(dl(Mi.  with  tumid  und)os;  outline  elonji'ate-ovate, 
with  a  uarrow,  rather  eloii.uated,  ta])ered,  slightly  excurved  jjosterior 
rostrum,  the  tips  divergent  and  j;ai)inj;':  Mu'  anterior  end  is  broadly 
round,  w  ith  the  dorsal  and  ventral  mar<;ins  <'onvex,  the  latter  uarrow- 
inji"  j«radually  posteriorly  with  a  slight  sinus  at  the  base  of  the  rostrum ; 
the  i)08tcro-dorsal  margin  is  concave,  so  that  the  end  of  the  rostrum  is 


If 


Nf).  IKiO. 


iu:nr-ir.nr:n  M(>i.rusr.t—it:i!i:n.i.   i  v/)  /;/>//. 


807 


.sonuMvliiit  uptmnrd.  'I'lic  eiitiic  body  <»l'  (lie  slirll  is  ('((vcifd  \\i(li 
iiuiiierons  narrow,  elovjitctL  radiatin;;'  ribs,  separated  \)y  imirli  uicb'i- 
coiiciivc  iiilcrspaces,  some  of  tlie  widest  of  wliieli  liave  a  small  second- 
ary I'ib  in  tlu^  center  toward  tlie  mariiin;  the  ribs  increase  in  elevation 
and  strength  i)osterioily,  toward  the  l)ase  of  t]\^y  rosd-iiin.  bnt  never 
become  bi'oad;  for  a  short  distance  on  the  base  of  the  roslriini  tlie  ribs 
are  nearly  obsolete  but  Ix'como  promiiM'nt  aj^ain  on  its  <lorsal  and  ter- 
minal jxtrtions;  this  part  is  also  crossed  by  iire};iilar  raised  lines  of 
•growth  which  cross  the.  ribs  obliiniely;  the  inner  snrface  is  covered 
with  lonnded  j;i'oo\ cs  corres|)ondin<i'  to  tiie  external  ribs,  separated 
by  convex  ribs  of  abonf  the  samewidtli;  the>e  l»ccome  obsolete  aiite- 
rioily  and  posteriorly.  The  hiniie  iinirj;in  in  the  leftvalxe  is  only  a 
littl(5  thickened  and  sli.uhtly  excnrved,  the  cartilage-plate  is  central, 
stont,  le^ndarly  ovate  in  Ibrm,  with  a  thickoiu'd  inner  marj^in;  in  tiie 
right  valve  there  is  a.  proiinnent,  rather  stont,  elon-iiited  j)osterior 
tooth,  the  anterior  end  of  which  Joins  closely  the  (tartila.m-  plate,  leav- 
ing scai'cely  any  notch  between;  tin;  highest  i)art  of  the  tooth  is  near 
the  middle,  the  slo])e,  however,  is  ii  little  steepci-  anteriorly:  a  deep 
grooves  separates  the  tooth  from  the  thin,  slightly  excnr\ed  dorsal  mai- 
gin;  anterioi'ly  the  nnirgin  is  but  slightly  thickem'd,  and  shows  a  very 
narrow,  beveled  edge  externally  (or  the  attachment  (»f  the  thin  liga- 
ment: a  similar  but  nior(^  distinct  ligamenlal  gro(>ve  extends  from  the 
beak  to  the  base  of  the  rostrum;  there  is  a  short,  lather  stout,  rib  like 
(daA'iide  or  buttress  running  from  beneath  tlu^  nuddic  of  the  tcxUli 
obliijuely  baidcward  and  downward  in  the  direction  of  the  base  of  tln^ 
rostrum:  a  less  pronunent  buttress  is  also  present  in  the  left  valve. 

Length  of  one  of  the  largest  specimens,  L*.~»  mm.;  !  ight,  15  mm.; 
thickness,  1 1  mm.;  from  beak  to  end  of  rostrum,  li>  mm.;  to  antero- 
ventral  margin,  1-  mm.  One  badly  broken  valve  is  considerably  larger 
than  this.  There  are  also  two  young  live  specimens  which  measure 
about  (•  nun.  in  length  and  .>.")  mm.  in  height.  Their  form  is  sonu'what 
narrower  and  longer  than  in  the  adult,  and  the  rostrum  appears  rather 
longer  and  narrower;  the  ])()stero-dorsal  margin  is  ueaily  straight;  the 
ventral  margin  is  decidedly  concave  at  tlu^  base  of  thc!  rostrum;  the 
shells  are  very  thin,  somewhat  transparent  and  glossy,  and  have  about 
twenty  six  sliai'j)ly  delined,  considerably  eh'vated,  nearly  equal,  nar- 
row ribs  on  the  body  of  the  shell,  separated  by  much  wider  spaces; 
the  edge  of  the  left  valve  overlaps  that  of  the  right.  esi)ecially  along 
the  Ttase  of  the  rostiuni. 

In  general  apiH>araiu;e  this  species  greatly  resembles  (\  iindticostdta 
Verrill  and  Smith.  It  <lilt'ers,  however,  in  having  a  regularly  more  ovat«^ 
form  with  the  anterior  region  somewhat  narrower  and  more  prolonged 
and  the  postero-vential  margin  less  incurved  at  the  base  of  the  ros 
trum,  so  that  the  latter  is  broader  and  less  differentiated.  Tin;  exter- 
nal eosta' diller  in  being  narrow  and  sharp,  separated  by  broad  concave 
inters])aces,  and  of  nearly  uniform  size,  there  being  no  marUed  contrast 
between  those  on  the  anteri(U'  and  posterior  portions  of  the  shell, 


808 


i'i!>>(i:/:i>i\<;>i  or  riii:  s.iriox.u   i/rx/.r.u. 


\i'\..\K. 


illtlioujili  tlic  clcviitioii  and  (listaiicc  Ix'twciMi  tliciii  ^iiaiiiially  increase 
posteriorly,  while  in  tlie  loiiner  fliey  are  broadly  ronnded  and  se|»iira(ed 
loi'  the  most  i)art  by  narrow  inlt-rstiees.  The  hinjic  also  diflers  <'onsid 
erably;  tho  eaitila;^e  jdate  is  less  prominent  and  broader  than  that  of 
mulUcostdtd,  and  the.  t<K)tli  in  the  ri.^ht  valve  is  lonjicr  and  n()t  s(» 
prominent  and  scarcely  forms  a  iiotcdi  at  its  Junction  with  the  cartilaj^o- 
phit«';  anteriorly  the  marjiiii  is  very  thin  and  simple  with  a  veiy  nai- 
row,  linear,  li.namental  jiroove  alon^  its  outer  ed<;(',  while  in  tlie  former 
the  groove  is  broader  and  its  inner  edj;e  is  raised  almost  in  the  Ibrni  of 
a  lateral  tooth. 

It  also  iesend)h's  ('.  rostdhda  \iu.  corpiilciitu  Dull  in  the  character 
of  tho  costa',  but  the  bittei'  is  much  shorter  and  hi<;her  in  lorni  and  has 
a  vi'ry  short,  ill  delined  roslrun). 

Two  youni:'  live  sjx'cimens,  two  separate  vahes,  and  some.  (Vaj^inents 
were  taken  at  three  stations,  between  N.  hit.  td  '  L.'!>'.  \V.  lon^i'.  <!(»  *  14', 
and  N.  lat.;UP47',  W.  hmjjf.T.'^o  W  .!(»",  in  l,(;sr)  t(»l,Sl'5  fathoms,  ISSri-SG. 

CARDIOMYA    MULTICOSTATA  Vcrrill  anil  Smith. 


< 


i 


I 


(I'liito  I. Will,  liu'. :{.) 

Xe<vnt  muHicoslitla  \'ki!Uii.i,.  'I'raiiH.  Conii.  Aciul..  \,  ])..">!»,  jd.  i.viii,  (1;;.  10.  I.sS2; 

VI.  ]).  277,  ISSl;   V.\\)\.  Alliiili<it<K,  liciioit  I'.   S,  Coin.   I'IhIi  aiitl  I'isliciics  lor 

188;{,   1>1.    xxx,  iijf.  iL'it,   ISSn.— SMini.  i:.  A.,   K'eport  \oy.  ChnJlniiicr.   /.oiW. 

Laiii«>llil)r,iiiiliijitii,  XIII,  p.  liO.  18«.".. 
Not  Cardlomjin  striata  Dam.,   Hull.  Mus.  ('oini>.  Zoid.,  \1I,  ]>.  L'iis,  jil.  in,  li;;.  10, 

18S6;    Hull.  r.  .s.  Niit.  Mils..  No.  :!7,  p.  Oti,  1>1.  iir,   liy.  10,   ISSii;    I'n.f.  T.  8. 

Nat.  Mus.,  XII,  ]>.  281,  188!t. 
Cardiimija  striata  Dai.i.,  r.iill.  U.  S.  Nat.  Mn.s.,  No.  :{7,  i)l.  i.xv,  lij?.  1L'!»,  ISSit. 
Not  ('ardUtiiijia  coslellata  (Desuayes)  var.  ciirta  l>AM,.  Uiill.  Miis.  I'oni]).  Zoiil., 

XII.  ]).  2!I7,  ISSfJ. 
Xe<rra  muUiivstata  var.  carta  \'i.:i{iiii,i.,  Traii.s.  C'oiiii.  Ac'id.,  X,  ))..")(!(),  1S82. 

This  coini)aratively  rare  species  was  found  at  but  ei<iht  stations  off 
Marthas  Vineyard,  in  80  to  l."»S  fathoms,  1SS()-1SSl>. 

Although  this  species  resembles  ('(irdionii/a  sfrinta  (detfreys)  in  the 
character  of  its  sculpture,  the  marked  dilferenee  in  outline,  espetjially 
in  its  clearly  detined  rostrum,  render  it  advisable  to  keep  the  two  forms 
separate  until  a  careful  comparison  of  the  hinyes  can  satisfactorily 
deeide  the  question  of  their  identity. 

The  two  valves  desi,u,'nated  as  variety  (•urt((  have  the  radiating-  ribs 
rounded  and  not  angular,  but  fewer  in  nund)er  than  the  tyi)ical  form, 
and  must  be  distinct  from  oiria  of  Jelfreys,  which  Mr.  Dall  makes  a 
xaviaty  of  costcUata  oi  Deshayes. 


I 


N.).ti:ii).  i)i:i:i'-\y.\Ti  I!  Mi>i.i.rs<  a~\  rinni.t.  .t\i>  nr.^ii.  80!) 

CARDIOMYA   PKHHOSTRATA  Dull. 

iri.iirs  I, will,  li-  J:  i,\\iv,  iiK.  :i.i 

.\iii  Id  j)rrn»'lnilii  N'l'.iiltii  i,  Ti  :iiim.  (  iniii.  Aciid.,  \,|i.."itil,  Issj;   \'l,|i.J77,  |SS|. 
Card'iomjia  jirrt'iiHlniUi  I>m,i.,  liiill.  Miih.  ('oiiip. /oill,,  X  II,  p.  I'iMl,  pi.  ii,  li^^s.  ;!(i,  H/i 
ISSd;    jliijl.  I'.  S.  r.:\\.  MiiM,.  No.  :!7.  ji.  (Iti.  pi.  II,  lios.  Wn, :',},.  iSHll. 

Only  ;i  It'w  s|(«'('iiiiciis  wrre  obtained  from  scvrii  statiun.s  Ix'twccii  N. 
lat.  10  '  1.*)'  ;!0",  VV.  loii^-.  7<r  L'7',  iiiMl  N.  lat.  ;{'.•  1(1'  ;;(»",  \V.  Innn.  7(»  > 
T)!',  in  ."iS  to  ;!L;."i  f'atlioin.s.  ISSO-ISSK 

Sontli  to  (iianada,  in  .').'>'.)  to  I  Ki  t'atlionis.  -I  )all. 


I 

I 


CARDIOMYA   GliMMA,  new  species. 
(I'l.il.M  L.WI.  ti>,'s.  ;!,  I :   lA.MV,  (iu.  II. i 

Xf(iv<t  jianristridlii  llrsii,  Tniiis.  Cuiiii.  Acnil.,  \'i.  p.  ITU.  1NH.">. 

Xot  Miioiivra  piuirislrhtln  i»Ai.i,.  Mull.  Miin.  Cnmp.  Zin'll..  Ml.  p.  UOL',  issti;   Kiiij. 

r.S.  N.it.  .MiiH.,Xo.  :<7,  p.  (IX.  \SS[);  I'roc.  If.  S.  Niir.  Mils. .MI.  p. !.';;;!.  pi.  .\m,li},'. 

IL'.  ISS!I. 
<'arilli»tnin  s]i.  Krsii,  Hull,  Mns.  ( 'oiiij).  /.im"i1.,  X.MIl.  |>.  'JJ7.  is;);!. 

Shell  small,  iiuM|ni\alvt'<l,  tliin,  Iraj^ilc.  tianslnccnt,  l>lnisli  wliito, 
sonu'wlnif  ovafe,  with  a  well  (Idincd  lo.struin.  I  inl>«»s  smooth,  alitllo 
]>roniiiient :  the  beaks  small,  ine<»nsj)ieuous.  Tiie  antero dorsal  mai'j;in 
is  (convex  and  vises  distinctly  above  tiic^  l>eaks  so  tlnit  tlu^  greatest 
heijiht  of  the  shell  is  in  front  of  them;  thence  it  slopes  lapidly  to 
the  somewhat  ]»rominent  anterior  end;  the  ventral  martinis  broadly 
ronmled  with  a  slight  angle  at  the  termination  ol"  each  radial  rib, 
deciih'dly  incnrved  at  the  base  of  the  rostrnm  which  is  a  little  elon- 
gated, nearly  sti'aight,  somewhat  tapered,  and  rather  nplnrncd  distally; 
the  postero  (loisal  margin  is  depres.sed  and  somewhat  eoncave.  lOacli 
valvo  has  three  conspicuous,  ])rominent,  thin,  elevated,  distant,  radial 
ribs  on  the  i)osterior  half  and  a  fourth  less  distin(!t  <»iu>  at  about  the 
middle;  this  is  rudimentary  in  the  left  valve;  none  of  tlieni  reach  the 
umbos.  The  surface  is  also  covered  with  very  (lelicate  lines  of  growth; 
the  rostrum  does  not  have  a  diagonal  ridge.  The  hinge-margin  is  thin 
and  delicate;  the  right  valve  has  a  small  but  prominent,  nuxlerately 
long  lateral  tooth  separated  (Vom  the  v«'ry  nunnte  cartilage-plate  by  a 
distinct  notch.     The  lateral  tooth  is  supported  by  a  small  buttress. 

J.ength,  5  mm.;  lieight.  .'{  mm. 

A  few  specimens  olf  (lape  llatteras,  North  Carolina,  in  Kl  and  17 
fathoms,  1884. 


'-     k 


sio 


i'i;n(i:i:iu\(;s  or  nil':  \.itj<i\  ii    >//>/;/  u. 


VHf,.  \x. 


NO.  li:i'.i. 


i>i:k 


CARDIOMYA  OLYPTA  Hush. 

(I'Int.s  I.XM.  liu'.  1:   LX.WI.  ti-M.  It.  7.) 

.V(</)(j  lOKidlii   III  >ii.  I  r.iii>.  (  iiiiM.  Aciul.,  \l.  |i.   l7-\  |il    \i\.  i'\<i.  '2\.  \>*H'>;  \'.\\,\. 
tlliiilroH^.   I.'t'porl   r.  S.  ('(iin.   I'ImIi    ntiil    T  isliii  ifs  lor   IHS!!.  p.   "iST,    ISsr>;   iioi 

Sowcrliv ,  IMS  I. 
('(trdloiiiijn  oriiiilixn'nuii   1)ai,i..  Itiill.  \(ii>.  (  Onip. /oiil..  X  II,  p.  2!tt!,  IHH)!;   Hull.  I'.  S. 

Xiil.  Mii^..  No.  :t7.  p.  (•.(;.  i>l.  Ml,  Ho.  L'l.  iss!i. 

A  fVw  H|i«M*iiii<'iis  wen' tniiiid  ill  two  stiitioiis  ulV  Ciipc  lliittniis.  Noifh 
Ciiroliiiii.  ill  4S  f'iitlioiiis.  Soiilli  to  ( iuiidiiloiipr.  in  1'  to  ll'4  Ciitlioiiis. — 
Diill. 

Ill  iidditioii  to  flic  piihlislicd  di'scriptioii  it  slioiild  \)v  stated  tlial  tiic 
aiilcro  dui'sal  iiiiii<;iii  of  t  lie  liylit  valve  iis«'.s  into  a  distinct,  pidiiiiiicnt, 
obtuse  lobe  in  front  of  the  tootli:  tliis  lobe  ovei'Iaps  the  iiiai',uiii  ol  tiie 
left  valve  wlieii  the  shell  is  closed.  'I'herc  is  a  small  luittri'ss  beneath 
the  ])ost«'rioi'  lateral  tooth.  ( )ne  broken  valve,  considerably  larger  than 
tlu^  tyjie.  has  in  the  intervals  between  the  three  primary  ribs  two  or 
three  small  secondary  ones;  on  the  anterior  end  six  ribs  arc  \isible,  of 
which  one  or  two  are  larucr  than  the  rest,  so  that  altogether  about  thir- 
teen or  fourteen  ribs  can  be  <'()unte<l:  some  of  these  are,  liowe\er,  \»'r\ 
small  and  extend  only  part  way  to  the  umbo;  even  the  larj^cst  do  not 
extend  over  the  extreme  ]iart  of  the  uiiilio. 

Mr.  Dall  considers  this  species  to  be  identical  with  l)'()rbi<;iiy"s  oniu- 
tissiiiKi,  l)iit  we  see  no  sunicient  reason  for  uniting  the  two  forms. 

'J'lic  name  cosiaia  was  used  by  Sowerby  in  ls;u. 

HALONYMPHA  STRIATELLA.  new  species. 

(I'lnt.'s  I. XXII,  liK-8.  2.  \\\  T-?xX\II,  Ii-.  10.) 

Shell  small,  thin,  broadly  and  obli((uely  ovate,  with  a  narrow,  shoi't 
rostrum.  IJmlto  swollen.  I'.eak  behind  the  middle.  The  antero-dorsal 
niarjiin  is  liroadly  and  nearly  evenly  convex  ;  the  anterior  end  is  evenly 
rounded;  the  ventral  marjii?)  i  •  broadly  convex  with  a  slijjht  incurva- 
ture at  the  base  of  the  rostrum,  which  is  short,  narrow,  and  obtuse  at 
tlie  end;  the  ]»ostero-dor.>ai  mar^^'iii  is  stronf.(ly  concave  and  slopes 
rai)idly.  In  the  rej2,iou  of  the  umbo  the  surface  is  lustrous  and  nearly 
smooth,  but  marked  with  faint,  parallel  lines;  elsewhere  it  is  closely 
covered  with  very  regular,  line,  raised  cimcentric  lines  separated  by 
incised  lines  of  about  the  same  width  or  narrower;  on  the  rostrum 
there  is  a  faint  diajional  ridf>e  posterior  to  which  the  concentric  lines 
are  irregular.  The  interior  surface  is  smooth  and  lustrous  but  the 
exteriuil  lines  show  through  by  transparency.  In  the  right  valve  there 
is  a  small,  sharp,  ti'iaiigular  tooth  ])rojecting  inward  with  a  very  small 
cartilage-i)it  in  front  of  and  contlueiit  with  it ;  slightly  farther  forward 
there  is  another  small,  slender  tooth  rising  nearly  parallel  with  the 


maigin;  extern: 

nu'iit  occupying: 

extending  to  tl 

and  prominent 

projecting  dow 

upper  siirlaie 

near  the  beak  t 

thickened  ridg< 

licngth,  <)  mi 

One  valvi',  st 

78^  7'  .'.()",  in  ;'. 

This  sjjecies 

the  latter  is  mi 

broaib'i"  rostri 

shelf  like  clavi< 

able  distance  i 

sliell  described 

be  a   distinct 

nearly  the  sam 

The  figure  of  f 

theoiiiission  ol 

of  tlie  left  val 


Xitirn  (j'uinn 

Three  imjie 
between  N.  1; 
VV.long.  7(P 


Si'tiVd  riiiiii 
Ikt,  \X> 
XIII.i> 

Shell  snial 
gaping,  obliii 
swollen;  be;i 
anterior  por 
dorsal  niarg 
and  evenly  i 
nous  and  in* 

'  Report  Vo 


N.i.u.m.  i>i:i:r-]y.\i  I  i;  vni  i.rs<A    yr.inni  i.  .\\i>  insii.  Hll 

iiiiir;;iii;  oxtmiiil  to  tliis  tlicn-  ;in'  i«'iiiii;iiils  (»!'  a  sinall  iUiU'iioi'  lij,M 
iiH'iit  nc(ii|iyiii>;  ;i  slicirt  fiiirow.  < 'omiiiciiciii;;  lM'liiii(l  t  In- l)ciik  iiiul 
fXtfiKliiiji'  to  tlic  Icisc  <tl  the  rostnilil,  tlicic  is  :i  coiiipiii  ;iti\  ely  l;ir;;»' 
aii'l  pioiniiu'iit  liiinrllituiiu  iuocch.s  lisinu  IVoiii  briiriitli  tiu'  inai'^^iii  atiil 
projt'ctiiiy-  (lowiiwanl.  w  itli  tlic  facr  |tortioii  Iiroadly  roiuidcd,  and  its 
upper  snrl'iU'c  (•nncavr.  Above  tiic  base  ul"  tins,  and  cxtciidiii;;'  tVoiii 
near  tlie  beak  to  about  tlie  middle  of  the  rostrum,  is  a  iiiinow,  sli;iiitly 
thickened  iidj;e  separated  Irom  tiie  <h»rsal  miiri:iii  by  a  nari'ow  l'urr(»\v. 

Len^tii,  (I  mm.:  hei>;iit.  I..")  mm.;  brradt  h.  about  .!  mm. 

Ono  valve,  station  L*(!;V"t,  aiuon;;'  l''oraminit'era,  N.  hit. -7  '  2li',  W  .  hm;;-. 
78"'  7'  .".()",  in  :i;{S  fathoms.  ISSi;. 

'IMiis  s|)eeies  lias  eonsiih'rable  lesembhinee  to  If.  rliirinihihi  |)a!l,])Mt 
the  lattei'  is  more  rej;ulaily  o\ate  in  form,  and  lias  a  murh  siiorter  and 
broaib'i'  rostiiim,  and  somewiiat  coarser  scnlptnre.  The  posterior 
shelf  like  cla\iele  also  dilfers  in  form,  iteinu  (juite  mtrrow  for  a  consider- 
able distan<('  ne\t  the  cartilaitc  pit.  and  more  expamled  distally.  'I'he 
shell  (h'seribed  and  li;;iir»Ml  b>  Snnth'  undei'  the  same  name  a|)pears  to 
be  a  distinct  species,  and  amy  l>e  identical  with  our  shell,  for  it  has 
n«'arly  the  same  Ibi  in  and  auiees  closely  in  the.  narrow  tapered  ro>trum. 
The  tifi'ure  of  the  interior,  liowe\ cr,  in  that  case,  is  incorrect,  owin^'  to 
the  omission  of  the  clavicle,  and  appaiently  the  substitution  of  the  hinye 


MYONERA  GIGANTKA   Verrill. 

(I'liilr  lA.W  I.  ti-s.    I,  ."■).) 

Nfivrn  ij'Kjatitiit  X'l.uitir.i..  'I'nms.  ('oim.  Acad.,  VI,  pji.  L'L';!,  L'TT,  1SS4;  Exjil.  AUm- 
tronn.  I'fpoit  I'.  S.  Cnin.  I'isli  and  ["jhIh  rir-<  fiir  iss;;,  ^i.  .",71,  iss.'i. 

Three  iini)erfeet,  (b'ad  s])eciinens  have  been  found  at  three  stations 
between  N.  hit.  'AS"^  L*L",  W.  lonj-'.  70'  17'  •".(►".  and  N.  hit.  ;!7  .")(;'  L'O", 
W.  lony.  70'^  57'  .;()",  in  l,SL>r)  to  1,!>17  fathoms,  IS.S.I  and  ISSO. 

MYONERA  RUGINOSA  (Jeffreys)  Verrill  and  Bush. 

(I'latfs  I.XXil,  lin.   I;    L.\\I\-,  li--.  2.) 

yeiira  riiiiiiiosd  ,li:i  i  1!i:ys,  i'mc.  '/.niil.  Soc.  London,  p.  MIL',  jd.  i.wi.  li.n'.  7,  Xovtiii- 
ber,  1881. — .Smi  rii.  M.  A..    Iv'rpoit  \'oy.   Cli(iUeii;i<i\  Zoi'd.  Lainellilniini  liiala. 

Ml  I.  p.  :!.'>,  iss.-). 

Shell  small,  short,  broad-ovate,  Jiot  juueh  swollen,  with  a  short,  wide, 
j:a pin ji', obliquely  tinncatc  rostrum.  I'mbos  small. prominent,  not  nnudi 
swollen;  beaks  small.  ])rominent.  incurved,  smooth  and  shininj;'.  The 
anterior  portion  is  evenly  rounded,  nearly  semieircniar;  the  antero- 
dorsal  margin  is  convex  and  i)romineiit :  the  ventral  inaryin  is  broadly 
and  eveidy  rounded,  exee])t  at  the  base  of  the  rostium  when;  it  is  sin- 
uous and  iiuiurved;  the  jwstero-dorsal  margin  is  nearly  straight  to  the 


II 


'  Report  Xoy. Challeiiijir  Zoc'd.  I,:iiii  ■llihrancli  ata.  XIII.  p.  52.  pi.  ix,  liys.  H-Hh,  1885. 


SI -2 


i'i:(i(i:ri>i\t:s  <>/•  ////•  \  iiios  ti    mi  siim. 


nul  III'  t  lit'  short  rosi  luiii  w  liifli  lias  a  ilisi  iiitM.  iiuMliaii.  diamMial  litli;*'  or 
a  1 1, mi  la  t  ion  aii'.i  aiiolhcr  less  tlisi  iiicl  our  a  I  ils  Uasc.  Tlir  si  if  la  cr  of  t  lie 
mIm'II  is  thickl\  covciril  willi  vcrv  iiiiiiu'roii^'.  ami  cidwilitl,  roiicfiil  rir. 
inoic  or  ifss  iiit'ijiilai ,  raised  litii's  ol'  lii  o\\  t  ii  u  iiicli  L;i\  c  it  a  liiiclv  lam 
ollost' appoaranc*' wlit'ii  vii'ucil  iimlcr  a  Umis.  I'Ih'sc  linos  hi'ci.iiic  iiioro 
cfowdt'il,  moro  proiiiiiiciil.  and  lorm  iwo  sinuous  \\a\<'>  in  i-rossiiiL;  tlu- 
iDstiiim.  Color,  in  alcohol,  w  into  liiiLit'ii  with  n'ddish  Im'owii.  liic 
li!ii>;»' inarji'iii  is  (h'iicaic;  iho  li^hl  \al\t'  lia.s  no  lattual  tooth  l>iit 
sliows  a  slight  ihicUoiiinu  <»r  I  he  posituiof  niaruin;  iho  cait  ii.iiio  phitt* 
is  small,  ovalt'.  diii-clfd  l)a<k\\ard. 

I.tMii^tli,  <■>  mm. ;   hci-ihl.   I.omm.;  lucadt  li.  o  iiini. 

One  li\t' spcciii  fii  ^  No.  oL'ol  h,  station   LTiTO.  N.lal..;i»     .".I.  W  .  loiii;. 
r.7     r>  ;{(•   ,  m  l.Sl.;  lathoms,  1SS,"». 

"  I'l'iiKpiiK    l''i\pt'diti(Ui,   ISTti,"  oil    ('a|it'   Miuidt'i:o,  in    .'Id  to    l.o;>,"i 
tat  lioiiis. — .IflVrcvs. 


I 


$ 


M.    II 


MYDNl.KA    1   IMA  fill  A    n.iU. 
J'lal,'  I  \\l\  .  ll-.S.i 

Sfiiiii   liiiiiliilii    l>\ii,    Hull.    Mil-.  (  ..iu|i     /.>..!. ,  l\,    |>     tl'.',  issi.     Smiiii.  \     \.. 

Id'lio'l    \  i>\  .    I  liiilli  iK/i  r.  /oiil     I  ..iiiii'llilu  .iiirhl.il  .1.    \l!,   p    il.',    ISS,">. 
Mili>li<->it  liiiiitlulii    I'M  I,    iillll      Mils.    ('i>lii|i.    /iiol.,  \  1  I.  |i.   IliU     ]il.    111.    li;;.    ,"i.     l^.si;; 

I  ill  II.  1.  S.  \;il     Mils.,  No    ST,  p.  dS,  |il    111,  I'il;    Ti.  lss;i. 

.\  siiij^lo  li\i'  spoiMiiuMi  ^^No.  .'lS17h  was  taken  at  stalioii   '..'OIS.  N.  lui. 
•10     -  ,  W  .  I»»iij4,  (IS     :.(»   ;;(l   .  in  .M7  I'alhoiiis,  iss.;. 


IVlYONl'.l'iA  ^  >  IM^l'  riOSA,   n<  w   nihh  ics. 
,  I'l.ilr    l.\\\  II.  I'm.  :..  1 

Shell  small,  \riv  thin  aiul  I'la^ilc  iit'.iily  t  lanspaiont .  coinprovsid. 
•doiij;att'  o\  al  with  a  w  ell  doliiu'd.  si)iuo\\  hal  t'loiiLialt'd  rostiiim.  I  inlio 
prtuniiicnt,  sea  ice  ly  td)li(pu'  and  ncarlN  .siiioot  h.  I'lif  aiittMo  dorsal  mar 
^iii  is  iMUiv  i'\.  anlci'ior  end  e\«Mily  nuiinU'd:  \entral  iiiaii:in  broadly 
ron\r\,  l»»'etuiiiiiji'  inciir\ed  at  the  base  of  the  rostriim;  |>ostero  diusal 
iiuifi^in  nearly  St  raiuht.  The  anloro  doisal  reuioii  is  distineily  e\e,i 
\  att'd  in  front  ot'  t  lu>  beaks.  The  bod\  it\'  the  shell  is  oi  iianitMiied  \\  ii  h 
ttMi  (U  iii(U«'  thin,  distinct,  sIil;Ii|I\  raised,  concentric  ribU'ts  separated 
by  iiiucli  wider  intiuspaccs.  On  the  ntstriim  there  are  two  well  marked 
minutely  spiiiiiloiis  keels  belween  which  are  delicate  lines  ol"  i^rowth; 
the  lirst  runs  tVom  the  beak  ipiite  I'lose  to  and  parallel  w  il  h  t  he  dius.il 
murjjin  ;  w  liile  t  he  seciuid  t'xii'iids  tnuii  I  he  umbo  di,ij;(Uiall\  across  i  he 
rostum  to  its  low  ei  edj^'e, 

l.eiifitli,  (!  mm.;   heij;lit.  o  mm.;  bre:idth.  ;iboul  '_'  mm. 

IMiis  shell  has  no  very  clost'   n'si'mbkiiice   lo  any  hitluMto  described. 

Oue  vah  e,  st;itioii  •_'(;;»,">,  N,  bit. -7     L"-' ,  W  .  h»n>;.  7S     7    oO  ,  in  .hk; 
latlioins.  ainoufi'  l'\M;imiiiilera.  iSStl. 

.\s  but  ;i  U'lt  \;il\e  was   l(Uind.  the   true  positiiui  of  this   sjiciies  c;in 
not   be  decided. 


7 


^^Pn 


Mill  ;si. 


l>lli:u  I  III:   \i(>!  I  ISC  I     iiin.iii     i\i>  i:i  sii 


Sllj 


I'l' 

he 
If. 
Ill 
'I  (' 
lie 
he 
lilt 
lie 


I 


I 


l';imil\    I'OK'OMN  Ih.i;. 

I'OKt^MYA    SUIU.I-'.VIS    Vni  ill,  v.ii  u-i  v  MU'KtUHlN  I'A  U.ill. 
i  I'Lilr.s  I  AW  I.  li--..   1,  •-';    I.WW  II,  li-.   1.1 

/■(i;Mmi/ii  •iiililiiis  \  I  i;i;ni,  I'laM-'  (  iviiii.  Aful.,  \  1.  |>|>.  'J'.M.  "JTT,  |il,  \\\u.  lij;'. 
'Jl,  IS^l;  r.\(>l.  Ilhitlrt''<i.  Ii'i'poit  1  S,  t'uni,  l''i-,li  and  liMlu'iu--  loi'  ISS!?, 
|i.  ."i7l,  pi.  \  \  \  .  liu  r."<,  l>^^i  l>Ml,l!iill.  Mils.  Idilili  /.oul  .  \  I  I.  |,|i,  :'S1, 
•-'SL',  ISMi;  Will,  |.  Il>,  l^^!^  ,  \.m.  I>  .M;  lliill.  1.  S.  Nal,  M  il>  ,  \...  :17,  |.. 
lis.  |,1.   1  \\  ,   lij;.   r_',s,   l,s>il, 

I'liiiiiiiilil  iiliiiiHliiiihi  |l\li,  run',  r,  S.  \al.  Mm'..\I1.  p.  -.'!NI,  |)|.  \  111 ,  lis;,  li.  ISS'.t 
,  \aiii'ly  M. 

Shell  liillifi  laii^i'.  Iliii-k.  w  ell  :(>iiii(1»mI.  ((udiilf,  iiif(iiii\  ;il\  cil,  \  ciy 
liiiiiiil,  w  il  li  \t'i\  hilut',  intiiniiifiil  iiiiiliiis  wliifh  arc  .s|  loiiiils  ciiixril 
loiwanl  siiiiall\:  bcalv^  lai'ur;  liiiiult'  siiiall.  i't>nlatf,  (iHcii  iioi  m-iv 
(li^iiiitl.  I'Ih'  slu'll  \  aril's  ciiii^iilcialilv  ni  i>ul  line  and  m/c  and  clcva 
I  lull  (iC  I  lie  iiinlxis;  in  imi>t  spi-tiiiiciis  llic  lici^lit  «'(|iiaK  or  >lii;lilly 
»'\ctt'ds  I  ill'  It'iiul  li ;  llu'  oiilliiu'  ot'  liic  ia\il.\  of  llic  slicll  is  iiMially 
soincw  lial  flii|il  icai,  llu>  lt'iii;lli  dccidt'dlv  t'scri'diiiL;  liu'  ln'ii;lit,  luit 
.soiiict  iiiit';>  il  i>  iu',iil\  (ii'iiiiai.  riit' aiiici  lor  and  jklsI  ci  lor  iiiai^iiis  aic 
iiMiall\  iucKn  cNciily  Kiiindctl;  1  lir  \  nit  lal  inaiijiii  usually  inoifcls  a 
litlli'  in  tilt'  iiiidillt';  tilt'  Iti'al^  is  .sHuatrd  in  Iroiit  t»l  llic  incdiaii  line. 
I '.  \lt'i  nails  tlir  shell  Is  nearly  siiiiMiih  and  i.s  cuNered  with  a  thin, 
el(isel\  adheieiil.  In  ow  iiish  veUow  e|ndeiiiiis ;  uiidei'  a  leiis  (lie  sin- 
t'aee  shows  iniiiiile  laised  [loinls  or  l;i  aniiles  w  liie'  are  ananueil  in 
radial  rows  ihat  Iteeoine  iiioie  distinet  and  eiowded  |ioslerioil\  Itiit 
loi  llieniosi  |>irl  disappear  on  the  most  proiniiieiit  part  ol'  I  he  miilxis. 
I'liese  grannie  liUe  points  aie  variable  iii  iiiiinln'r  and  distmet  ne.ss,  in 
some  speciiuens  liein^  iiearl.\  ohsolele  and  in  tdliers  dislim-t  and  re^ii 
la.rly  airanu'e*! ;  t  he  epideiiiiis  ol'teii  also  shows  line  lines  ol'  ;:iowtli; 
the  beaks  aie  sinoolh  and  shiiiiiii;.  The  lell  \al\e  has  a  p 'sterior, 
wa\('like.  radial  depression,  and  ludiind  this  a  low.  rounded  riilf>o 
proieel  inu  at  the  inaruiii  as  a  sliL;li'  siphoiial  lolie:  in  the  iij^iit  \al\«', 
the  eon-espondiiii;  lobe  and  depression  are  oiilv  laintly  marked  in  most 
cases,  liicriuh;  \  al\ »' is  larger  I  liaii  I  he  Icl't  and  o\  cilaps  it  eonsidei- 
abl',  alo,..:  the  \eiitial  inaii^in  and  boili  in  I'roiit  ot  and  behind  tlio 
be;  k.  .  riie  interior  IS  pearlv  and  olteii  shows  radial  siriatioiis,  I'ne 
liil.m'  inaif^in  is  eoiisiderably  tliiek«'netl  and  strongly  eiirxed;  the  ri^lit 
\al\e  las  .i  huiLie.  I  hiek,  somewhat  rounded  tooth  jiist  lieiieat'.i  he 
beak  and  adiiatc  to  the  inner  siii't'aee  ol'  the  shell,  t'oi-  >ome  disiaiiee 
w  itliin  t  he  ea\  ity  ol  the  beak  and  to  the  Ihiekeiied  eilL;t'  btdiind  the 
beak,  bill  separated  t'roiii  I  he  anterior  maruiii  by  a  deep.  iiir\  ed  lui  row 
in  1 1  u'  I  una  la  r  area  ;  I  he  liiniil.ii  inaryin  is  eoii\a'\  ami  so  mew  hat  e\  eitt'il, 
a»Miili'at«'d  I'ldiu  ilu'  rest  td"  the  anterior  iii.iri;iii  1>>  a  sli;;lit  !n;t«h.  'IMu^ 
liji'ament  isratln'r  loiij.',  and  well  romided  and  its  moove  extends  tor 
waidiii  a  curved  I'lirrow  under  the  beak:  it  extends  backward  in  a 
i'iir\cd  liuc   paralU'l  w  ilh    .In-   margin   ol    the  slioll   I'or  some  ilistaiU'O 


wmmm 


814 


f'nnri:!:nr\(;s  or  riii:  vr/vovi/,  i/r.s7;ri/. 


^■ln..  XX. 


NO  inn 


behind  the  tootli.  Ilxteriiiil  to  tlic  jiostcrior  ]tiiil  ol'tlir  Iiu;iiiifiil  there 
is  a  suhniaiij^iiiMl  thiekeiiin.ii' or  tbhl,  cspeciiillx  in  the  riy;lit  valve,  in 
the  left  Viilv(>  the  central  tooth  is  K'prescMited  l»y  an  irreunlai'.  l)ilol»t'il. 
or  soinewliat  V  shaped  lliiekeninj;' of  the  niarjiin.  of  which  (lie  anteiim 
part,  sitnated  Just  in  IVont  of  the  beak,  is  themore  ])roininent:  bntthi> 
varies  in  form  in  dilferent  specimens.  Tlie  poster«»-(h)rsal  mar^uin  aluii^' 
the  liyainental  i'e<;ion  is  less  tlii<d<ened  bnt  has  a.  distinct  rounded 
rid.ye  inside  the  lijiament. 

Len.Lith  of  one  of  the  larjicst  spe-'inens.  Iti  mm.:  total  heiiiht,  Hi  mm.: 
height  of  cavity.  iL'  mm.;  breadth.  KI  mm,     in  a  more  romided  speci 
men   the  lenixth   is   1.")  mm.:    total    height.   l»i  mm,:  hei.t;ht  of  cavity, 
13.5  mm,;  breadth.  11mm, 

A  few  dead  specimens  of  the  tyjjical  form  {nKhlrris)  have  been  taken  at 
live  stations  between  N.  hit,  .V.r  15'.  ^^^  hdiji".  (is^  S'.  and  X.  hit. 
37^  ."it;'  LM",  \V.  lonji-.  7()o  ."iT'  .'5(1'.  in  l,.V.il  to  I,!»l  7  fathoms,  188;>-LS8(;. 

Se^•eral  live  and  dead  s))ecimensof  the  varietal  form  (uiicrothntta)  ]ia\e 
been  taken  at  eij^ht  stations  between  N.  hit.  .■5!>"  '-'(»'.  W,  lonu'.  (iS-^  .",'  ai>", 
and   X,  hit.  3(P  17',  W,  loiij;-,  7.!  '  !)'  ;;(»",  in   l,»i;n    to  I.Solt   fatlumis. 

issr»-iss(;, 

Mr.  Dall  exteiuls  the  ran,ue  south  to  l*at;if,''oiiia.  in  IL'I'  i>  H>'.\'> 
fathoms. 

Our  specimens  show  coiisid(Mable  \ariation  in  form  as  w.'ii  .is  •,.,  ilic 
])rominenee  of  the  cardinal  tooth  in  the  rij^ht  Mihc.  and  thus  unite  the 
extreme  forms  I\  .siihh  ris  \'errili.  and  /'.  itiicrinloitta  Dall. 


I 


CETOCONCHA  ATYPHA,  new  s^- jcies. 

Slndl  short -ovate,  nearly  (M|iiil;iteral.  ;ind  nearly  e(|ually  rounded  at 
both  ends,  jiidii'iuj;'  t'rom  the  lines  of  j^rowth,  I 'mhos  lather  prominent. 
but  less  so  than  in  several  allied  speiiies.  Ueaks  rather  prominent  and 
curved  strongly  forward,  but  not  spiial.  Surface  stuiiewhat  shiniii!.', 
and  slij^htly  iridescent  whei<>  rubbed.  co\erod  with  a  very  thin, yellow 
ish  epidermis  with  very  muneroiis,  minute,  jiianuleliki' elevations  which 
are  ari'anjzed  in  rciiular  radiatiuji'  lines,  aiid  aie  much  the  most  numer- 
ous on  the  posterior  end  where  tlie  ladial  rows  are  closely  crowded  ami 
the  j;rannles  in  each  are  also  near  to^^ether;  on  the  center  the  row  sand 
granules  are  moic  distant,  so  that  the  number  is  only  about  half  ;'s 
j;reat  in  the  same  sjjace;  on  the  anterior  end  tlie\  are  so  scattered  :nat 
the  radial  rows  are  indistinct  and  the  uraunles  ar«Mi  little  larger:  oii 
the  luimliir  area  they  are  nearly  obsolete.  The  anterior  end  and  lunii- 
lar  area  are  marked  by  rather  cons|)icuous  lines  of  growth  which,  near 
the  dorsal  marjiin,  take  the  form  of  distinct,  raised,  coneentrie  rid<;'es. 
The  antero-dorsal  margin  is  nearly  horizontal  iind  rises  np,  in  a  side 
view,  in  an  acute  edjic,  a  little  hijuhei'  than  tlu'  level  of  the  bi'ak,  so  a.-. 
to  j.roduce  a  broad,  compressed,  lunular  margin.  When  viewed  froa; 
above,  this  ])art  of  the  marnin  forms  a  very  marked  <»btuse  anj^le  with 
the  i»osterior  liingtMnaryin,     The  postero  dorsal  marj!;'i.i  is  also  nearh 


* 


r 


'IC 


1^ 


NO  1139. 


DF.i:r-n'ATi:n  MoLLmrA—vFuiuri  Axn  nusn. 


815 


f. 


% 


I 


liori/ontal.  sli<;lilly  coiivcx  or  nearly  stiiiij;lit;  tli«'  liuaiiiciit  is  v<'ry 
prominent  hcliind  tlic  beak,  exlendini;'  haekwiird  in  a  ♦•(>iis|ti<'U(»ns 
i;r(>()\('  nearly  to  tlie  posterior  end.  and  terminates  anteriorly  in  a  deep 
narrow  yrooNc  directly  under  the  beak.  In  the  left  \alv«'  the  inner 
ed,i;t' of  the  [)osterior  hin<;e  niar.uin  is  somewhat  sinnons;  just  behind 
the  beaks,  opposite  the  most  prominent  part  of  the  und»<)s,  it  is  thick- 
ened and  sonunvhat  revolute,  decreasin.u  botii  in  thickness  and  ele\a- 
tion  to  a  shallow  indentation  of  the  nnirjiin ;  back  of  this,  it  increases 
rejinlarly  in  thickness  and  jn'ondnence  and  is  ayain  revolute  aloiij;-  the 
posterior  ]>art  of  the  Ii<iamental  furrow.  There  is  no  central  tooth  nor 
any  distinct  resilium.  In  the  ri^ht  valve  the  posterior  hinii'e-maruin  is 
even  nuae  thickened  and  rc\olute  Just  back  of  the  beaks,  and  tlu>  in 
dented,  thinner  portion,  at  the  end  of  the  prondnent  part  of  the  liiia- 
ment,  is  more  marked.  Tlie  lijiamental  groove  is  consetpUMitly  less 
conspicuous,  bein<r  i)artially  concealed  by  tlu'  revolute  marj;in.  The 
antero-dorsal  marj^iin  is.,  compressed  and  projects  strongly  upwanl, 
I'isinu"  distinctly  above  the  umbos  in  a  side  view  and  is  inoi-e  convex 
tlian  in  the  left  \  alve.  There  is  also  a  sliuht  elevation  within  flu'  dor- 
sal niarjiin  directly  below  the  beaks,  which  inij;ht  be  considered  the 
rudiments  of  a  tooth. 

Till'  laryest  specinuMi.  when  perfect,  would  be  about  15  mm.  lonj^'. 

Two  very  much  broken  valves,  station  L'L'lii).  N.  hit.  37° 38'  40",\V.  lony. 
73^  K;'  30",  in  1.12;;  fathoms,  issi. 

This  species  somewhat  resembles  Cetorhoiicd  iilfhln  (^'errill)'  Dall.' 
It  is  however  more  oblonj^-,  with  the  umbos  miudi  smaller  and  less 
j'rominent  and  the  bi'aks  less  spiral  and  nearer  toj^ether.  The  j;ranu- 
lation  of  the  snrtace  is  somewhat  stronjicr  and  more  jienerally  distrib- 
uted. The  liji'amental  jiroove  is  longer,  deeper,  and  the  li.iiament  itself 
is  more  prominent  behind  the  beaks.  The  angulation  of  the  hin<;einar- 
gin  of  the  lett  valve  in  a  horizontal  i)laiie  is  a  peculiar  feature  not  fouiul 
in  the  other  related  species  and  indicates  that  the  \alves  are  decidedly 
unlik(>  in  foini.  but  the  rij;ht  valve  is  too  much  broken  to  show  the 
anterior  margin. 

CETOMYA  species. 

A  broken  left  valve  (  No.  r»i.'(>13)  from  station  LMSl,  N.  hit.  4P  T  30", 
\V.  long.  .-»7     10'   ir»",  in    IKI  fathoms,  resembles   I'oronii/a  [('i(<niii/(() 
(■l(nip(i(((   l>all.  from  the  West  Imlies  and   l)arba«b)s,  in  lOd  to  II!)  lath 
oms.     It  is,  however,  too  incomplete  for  determination  without  direct 
comparison  v.ith  authentic  specimens. 

It  is  larger  and  more  strongly  truiuMte  posteriorly  than  roioiHi/d 
jiraniilafit  (Nyst)  l-'orbes  and  llanh'y.  and  the  granules  are  coarser  and 
not  so  numerous.  It  ditfers,  more  tvei',  \ cry  strongly  in  thc^  hinge 
characters,  for  the  hinge-plate  is  much  thinner  and  the  large  tooth  in 
the  l(^ft  valve  is  wanting  in  our  species. 


I  ThiiKia  iiiliil,!  Vfiiill.   I'iMiis.  Coiiii.  .\«a(l..  \  I.  )>.  L'L'l.  ]>!.  \  wii.  lii,'.  L'L',  1881. 

■fitorhoiini   lliliilu    l>all,  I'.lill.  Mils,  Coiilli.  ZoipI,.  .\11,  j>.  L'Sl.  l,S,S(i. 


if 


Hlfi 


rROCEI'JDIXGS  or  THE  NATIONAL  Ml'SEVM.  vol.x.x. 


Fumilv  VHKTICOIIDID.E. 


VERTICORDIA   GRANULIFKRA  ( Verrill )  Dall. 

(Plates  LXXXVIl.  li-r.  2;   \('V.  li.us.  :',  3.  I.) 

PccrhioUa  graniilij'od  \'fiu{1i.i.,  Trans.  Conn.  Aiad..  \  I.  pji.  i:!l.  IIS,  l,">(),  lx8r>. 
rcrticorilia  <irii>iij'ir(i  I)Ai.r.,  I'.ull.  Miis.  ('innj).  '/.<>n\..  \I1.  p.  L'Sti,  1SX(!. 
I'crticorilia  (/ruiniliferK  Dai.i..  Uiill.  1'.  S.  Nat.  Mns..  No.  :?7.  i).  tili.  IXS'i. 

In  addition  to  the  publislu'd  doscrii)tioii,  it  .should  be  stated  tliat  in 
the  type-specimen  (No.  4  IS'JS),  the  liuiiihir  area  is  small,  deeply  sunken, 
witli  the  correspondiu}.'  internal  margin  very  much  thickened,  tWrmini; 
a  stronji,  curved,  tooth  like  projection  having'  a  rounded  summit,  reach- 
ing strongly  above  the  margin  of  the  shell  when  seen  in  a  protile  view; 
behind  this,  directly  under  the  beak  and  beneath  the  overlninging 
margin,  there  is  a  triangulai-  space  or  notch  for  the  reception  of  the 
l)rominent  tooth  of  the  opi)osite  valve;  this  in  followed  posteriorly  by 
a  short,  triangular,  shelf  like  projection,  a  little  beneath  the  margin, 
which  ha^  i  depressicai  on  its  upi)er  surface  for  the  rccei»tion  of  its 
ligament  b   t  s,  in  this  speciuuMi,  no  notch  or  scar  corresponding 

to  the  ossicle.  -irectly  under  the  strongly  incurxcd  beak  there  is  a 
slight,  thin  groove  in  which  the  front  ])artof  tlu^  ligament  was  attached. 
The  ])ostero-dorsal  edf^e  is  a  little  thickened  and  ]»rojects  inward  beyond 
the  general  line  of  the  margin ;  its  outer  surface  has  a  smooth,  slightly 
excavated  groove,  extending  ])aiallel  with  the  edge.  I'or  .some  distance; 
this  portion  was  overlai)ped  by  the  projecting  edge  of  the  opposite 
valve. 

A  very  large  specimen  (No.  78G79)  from  station  L*71.),  which  measures 
LM  mm.  in  length,  22.]  mm.  in  height,  and  H»  nun.  in  thickness,  has,  in 
the  right  valve,  directly  beneath  the  bi'ak.  a  very  strong,  high,  curved, 
pointed,  angular  tooth  attached  by  a  very  broad,  thick  base,  a  con- 
siderable distance  within  the  iiiargin.  llchind  the  ossicle,  well  within 
and  nearly  i)arallel  with  tlu'  margin  f(M'  its  ennre  length,  is  a  conspicu- 
ous shelf  like  ridge  against  which  the  projecting  edge  of  the  oi»i)osite 
valve  rests.  The  (issi(di'  is  strong,  sonu'what  rectilinear  in  outline, 
with  the  posterior  end  deeply  forked,  the  inner  surface  strongly  con- 
vex, the  outei'  strongly  concave,  with  thick,  somewhat  beveled  edges, 
to  which  the  ligament  is  attached.  Interior  surlace  somewhat  pearly. 
Scars  ami  pallial  line  not  very  clearly  delined. 

l)Ut  four  s{)ecimens,  beside  the  tyiie.  have  been  found  at  four  stations 
between  N.  lat.  Id  !)'  IW,  \V.  long.  <!7  ^  »',  and  N.  lat.  .id-  17',  W.  long. 
7;)    U'  'M",  in  i;6r>{i  to  1,6.V.»  hithoms,  LS8 1-1880. 


Ni>.  ii:i9. 


ui:i:i'-]y.\ TEit  M()i.i.rsc.\—vi:in;iLi.   t\i>  nisii. 


S17 


t 


Family  LVONiSlKLLIDJ-:. 

LYONSIELLA   SUBQUADRATA   (Jeffreys.) 

(I'hitf  I. WWII,  liu. ;{.  I 

I'l  fcliiolio   siiliiiiiililnilK  .1  Kl' l'l!l•;^  S,    I'Iik.   /niil.Soc.  Luinlnii.   |i.  l:;iL.'.  | 

NuM'iiilirr,  ISSl.      Not   l).\i.i.,  r.iill.  Mils,  ('oiiiii.  /.n<;i..  Ml,  |).  i' 


:«, 


()iir  s|M'('iiii('ii  seems  to  an'icc  in  t'Ncr.N'  respect,  exeept  si/e.   witli   I  lie 
oi'iyiiial  (lesriii)tioii  and  liyiire  as  j;i\'eii  l»y  -lellVeyiS,  uiirs  beiii^-  e((nsi(| 
erahly  larger. 

'riie  iimlid  is  prominent  and  t lie  beak  is  enrved  sti'niiyjy  forward,  pro- 
diU'in^' a  deep  lumilar  area  which  is  defined  neitlier  hy  a  fiiooNc  nor 
a  lid.ye.  The  surface  is  excrywheie  covered  with  small  Init  prominent 
{grannies  wliicli  are  numerous,  pretty  evenly  spaced,  and  arranged 
somew  hat  dist  iiictly  in  radiatiii.Lf  rows  whi(di,  under  the  microsciope.  are 
defined  by  slight  radial  ridyts  unitinji'  those  of  the  same  row.  The 
granulations  aie  easily  visible  with  sli<;lit  (Milar.iiement.  I'nder  tlu; 
compound  microscope  they  liavo  the  form  of  elevated,  acute  cones  and 
blunt  tubercles,  their  heij.!]it  usually  j^reater  than  their  diameter,  except 
oil  the  umbo,  wlieic  they  aic  low  and  rounded.  Internally  the  surface 
is  everywhere^  marked  with  small,  deep  pits  looking:'  like  punctures 
made  l>y  a  fine  needle,  and  correspond in;U'  to  the  external  j;faniiles. 
The  liinjic  margin  is  ihickened  and  entirtdy  edentulous,  as  desciibed  by 
.lelfrins.  Posterior  to  the  beak  there  is  a  distinct  .mrooxc  in  Hie  thick- 
ness of  the  niarnin  for  the  recei)tion  of  a  li,i;ament.  Ueneath  the  beak 
then'  is  a  sliiiht.  (tbli(|ue.  marji'inal  notch  or  slit  for  the  reception  of  the 
resilinm,  runnin,i;'  back  within  and  underneath  the  dorsal  margin,  so 
that  it  is  scarcely  \isibh'  in  a  direct  front  view. 

This  shell  ajjiiearsto  be  identical  with  the  species  oriiiiually  described 
and  liyiiicd  by  -letVreys  under  tlu'  name  of  Peccltiolin  nnlxiuddratd. 
Mi:  Dall  has  evidently  ibiiiid  an  entirely  dilVereiit  s])ecies  in  the  Jef- 
frey's collection  under  this  name,  which  he  has  referred  to  the  ;L;enus 
('((llm'(iiili((  and  subgenus  Wsivoiniiii.  belon/^iiij^-  to  an  entirely  ditlerent 
family  from  our  shell.  In  order  to  avoid  confusion  the  shell  examined 
and  described  by  Mr.  Dall  should  receive  a  distinct  specilic  name;  we 
theiefoie  propos«>  ('((ll<)c(irili((  (  \'i:si(<nnj/(i)  ilalli.  Mr.  Dall  states  that 
"the  sj»ar.sely  set,  microscopic  tubercles  can  only  be  obser\('(l  with  a 
maniiilier;  to  the  eye  tlu'  surface  looks  sliiniun'  and  smooth,"  which 
shows  the  surface  to  be  (jiiile  dilfereiit  from  that  of  our  shell.  In  his 
shell  there  are  also  two  cardinal  teeth  in  each  valve. 

One  val\e  iNo.  TSSOO),  statiim  2711,  X.  lat.  .".S  21",  W.  lon.y.  Tn  17' 
;{0".  in  I.SlT)  fathoms,  ISSC. 

North  of  the  Hebrides,  in  r»l2  fathoms:  and  oil' Cape  Mondeuo  in 
\'ij;()  Ua.N.  in  7!<t  to  LO!)."*  fathoms.  '•  I'Drviijtinc  Mxiieditiou,  ls»i!»-7()." — 
Jeffrey;-. 

I'roc.  N.  y\.  V(d.  XX — yi 


W. 


818 


■Hlilililili 


ruocEEDixas  of  the  xatiosm.  museem. 


vor,.  XX. 


LYONSIEe-LA  CORDATA.  new  species. 

1  l'l:it.'  XCW  tii-s.  7.  S.) 

Slioll   I'iitluM'   lar^e   iiiid    linn    lor   llir  ^ciius.  soincwliaf    Iriiiislnccnt 
bluisli    wliiU'.  swolk'ii,   ('(»r<l;ite.   with   ;i    itostorior  <)l>tiis('   ])r<)iiiiiiciicc, 
I 'mhos   ])roniiiiciit,  tiinicil    forward   .spirally;    beaks   small,    stron^ls 
iiicnr\('(l.     Ijiiiiiik'  small,  cordate,  deliiUMi  only  by  one  of  the  (M'dinaiy 
line  radial  rid.u'es;  the  jtart    that  lies  immediately  undei'  the  l)ealc  is 
deeply  sunken  with  the  edj^c  pinched  up  int(»  a  prominent  keel.     'I'lic 
anterodorsal  marjj;in  is  stronj^ly  convex  and  prominent  in  the  lunu' 
lar  region,  but  not  so  hi,uh  as  the  lunbos;  the  anterior  nuu'^in  is  l)nt 
slij^htly  convex  and   nearly  ])erpendieidar  to  the  axis  of  the  shell:  the 
ventral  nnirj;in  is  stronji'ly  convex  and  somewhat  pro(bieed  in  tiu'  nuM 
die.  farther  ba<k  it  is  but  sli>:htly  convex  ;  the  ])Osterior  <'nd  is  obtusely 
I'ounded,  decidedly  ])rominent  l)ut  not  angular:  the  posteiodorsal  mar- 
jiin  is  a  little  convex  and  slopes  j^iadually.     The  surface  is  co\  ercd 
with  ai>ont  sixty  «lelicate.  radiatinji,  raised  lines  or  liblets  which  are 
crossed   by   line  lines  of  j^i'owth.  the  thin,  brownish  or  ui'ayish  yieen 
epidernus  often  risin<;-  into  small  points  at  their  intersection,  especially 
anteriorly  and  posteriorly:  thesi'  rililets  become  coaiser  and  more  (lis 
taut  anteriorly,  and  are  lackinji'  on   the  lunule.     The  ligament  is  thin 
and  stionjr  and  exteinis  backward  alon<i"  nearly  the  whole  of  the  dorsal 
mar^iiin  ami  ciir\  .'s  spirall\  under  and  around  the  beak  in  the  re_i>i(ni  of 
tli«'  resilium,  so  that  the  two  come  ahnost  in  contact,     'i'he  hin<;e  nnir 
jLiin,  in  front  ol  the  beak  and  lunular  ar<'a,  is  stronjily  convex  and  ino 
tuberant.  rising-  nearly  to  the  heij-ht  of   the  umbo:    posteiiorly  it  is 
convex  and  thin  in  i)oth  \alves:  in  the  left  one  it  is  stren<>thened  by  a 
slij^ht  marju'inal  rib  within  the  li.uamental  fuirow;  both  of  these  are  less 
cNideiit  in  the  riuht  \iil\e.     There  are  no  teeth  in  eitlu'i'  valve.     The 
ossicle  is  relatiNcly  lar<ie,  oblon,ii',  somewhat  saddle-shaped,  narrowest 
ami  tium-ated  anteiioily,  broa(b\st  and  forked  posteriorly,  the  divisions 
acute.     The  resilium  beneath  the  ossieb'  is  well  developed,  dark  brown, 
ami  extemls  tbrward  ami  upward  to  the  mari^in,  beneath  the  beak. 

Len<itli  of  the  largest  s])ecimen.  11  mm.;  hei.yht,  iL'mm.  Another  is 
11  mm.  lonu:   ll..">  mm.  high:  !*  mm.  broajl. 

Two  living  specimens  and  one  valve,  at  three  stations  betwe'.>.'i  X.  hit. 
;J«»  b-)',  W.  long.  (;s  S',  and  N.  hit.  .'JT'  .W  Ki",  W.  long.  7;;  UV  :!()",  in 
1,41';?  to  l,Si',')  fathoms,  1.S8  l-]S,S(i. 


r 


7f 


Family  LVONSII ).!•:. 

LYONSIA  GRANULIFERA,  new  .species. 

iVh\U'  \V\  ,  \\)x.  1.1 

Shell  oblong,  truncated  jxtsteriorly,  imrrowed  and  r(tun(b'd  anteriorly. 
Tin  bo  rather  prominent  with  (he  beak  in  front  of  the  middle  and  cnr\ed 
forwartlj  lunular   area   considerably   sunken.      Anterior    end    evenly 


N<i.  li:;!). 


i>t:i:i>-n'.rn;i;  moij.i  srA~ri:i;i;n.r,  .i\i>  ursii. 


Sl!l 


III 


rounded  witli  the  dorsul  iiiarjiiii  riii)idly  sloped  ;  ventral  miirt;in  l»roadl\ 
and  evenly  nninded:  posterior  end  soinewluit  ohliijuely  tnineated  witli 
out  any  delinite  l>oiindary,  hnt  witli  a  distinct  dei>ressioiie\teiidin,L;  fro., 
under  the  l)eak  to  al»oiir  the  middle  ol'  the  ])o.sterior  inar;4iii:  postero 
dorsal  inar^in  nearly  strai<ilit.  loii,u<'r,  and  sloping;-  less  rajiidly  than  tlie 
anieiior.  The  entire  snrt'ac.'c  is  covered  with  ininute.  iirej-'iilai'.  raised, 
j^raniiles  and  pretty  distinct,  l»ui  irrejj^iilar.  lines  of  growth  and  sli;,fhily 
raised,  distant,  thin,  radiatin.i;  lines  riiniiin<;'  IVoin  the  iinilio  to  tlie 
niar.ii'in,  except  on  the  posteiior  end  where  the  lines  of  jirowfli  become 
more  pioiiiinent ;  these  radial  lines  are  however,  in  many  places,  rat  her 
faint  and  seem  to  consist  mainly  of  the  thin,  brownish  e|tiderinis.  which 
is  laciiin,i;'  in  certain  |)arts.  Minute  {i'l'ains  of  sand  and  shells  of  foram- 
inifera  ar<*  lirinly  adhen'iit  to  the  surface,  mainly  aloiii^'  the  radial 
lilies,  and  especially  posteriorly.  The  interior  i<  white,  lustrous  and 
but  slijihtly  nacreous.  Miiscuhir  and  pallial  scais  indistinct.  Tlie 
liiii<ie-marj;iii  is  thin;  in  the  left  \iilve  the  anterior  IxMch'r  is  somewhat 
thickened  in  the  Innular  area  and  terminates  abruptly  in  a  loiinded, 
toothdike  shoulder  Just  under  the  beak ;  the  posterior  niarjiin  shows  a 
slightly  raised  elon.uated,  rou«iliened  area  for  the  attachment  (d"  tiie 
resdium.  commencing''  under  (he  beak  iind  runniii,i;'  back  for  some  dis 
taiice  within  the  marji'ln.  on  its  nearly  ViU'tical  inner  surface,  so  that  it 
is  scarc<dy  visible  in  a  front  \iew.  Ossicle  not  (»l)ser\ed.  I.i.uament 
very  thin,  occupying'  a  urooxc  alon^'  the  posterior  inai  <^in. 

Len.uth,  l!>mm.:  heijiht.  l.'>  mm.:  bread!  h, '.>  mm. ;  from  the  beak  to 
the  anterct dorsal  anule,  7  mm.:  tt>  the  postero-d(usal  aiiule,  IL'  mm. 

One  valve  (No.  ol'otll ),  station  litlili.  N.  lat.  -to'  L'L",  W.  ion-;-.  :.S^ 
l.'>'  lo",  in  7"»  fathoms,  lS8a. 

'i'his  species  is  allied  to  /..  (ir<ii<>f<(i  (Moller)  with  which  it  ajirees  very 
closely  ill  the  character  <d'  the  external  surface  and  structure  of  the 
hiiiii'e.  It  differs  in  its  lon<i;'er,  more  ovate  form,  in  its  nuue  jiroduced 
anterior  end,  ami  in  its  less  sw(dlen  umbo. 


Faniilv  i'ANI)OKI]).,i:. 


CLIDIOPHORA  INORNATA,  new  species. 

.  I'lillr   \('\'.  liiiS.  r.,  (J.I 

Shell  small,  much  compressed,  very  ine(|iiilateral,  posterior  end   nar 
rowed,  somewhat  accmiiinate,  the  riulit    \'alv(;  Hat   oi-  slij^litly  convex 
and  the  lell  vahe  a  lit  tie  swollen.      I'liilios  not  iiromineiit :  beaks  small 
and    apiiressed.      The   anterodorsal    margin    is    slij^htly    convex    and 
slopes  rapidly  to  tlu'  bluntly  roundeil  anterior  end;  the  \ (Mitral  luariuin 
is  broadly  rounded  and  slif>htly   prominent,  consi<lerably  behind  the 
middle,   beyond    which   it    is    iiicur\ed    to   meet    tiui    posterior    rostral 
aiiunlation:  the  posterior  end  is  produced   into  a  short,  narrow,  sui) 
truncated.  slii:ljtly  upturned  rostrum,  its  lower  aiiiile  formed  by  a  siuiie 
what  [irominent,  radial  rib  or  lidye,  extending  fnuu  the  beak  (oii  the 


t    i 


s-jo 


r'i;i>ri/:i)i\<;s  or  rtir  .v  i //o.vj/,  Mrsr:r\i. 


vol..  \X 


It'l't  \;i1\(m:  the  pustno  (lor.'^nl  iM;ii\uiii  is  ii.>>ii;illy  slightly  coiicaNr,  liiil 
is  .soinct  iiiics  iit';iily  stiaijilit.  :iim1  in  some  cusps  decidedly  coiiciiN  c.  mikI 
slo])*'- uiiiilii:ill\  l<i  tlif  siipcridi'  hiil;ii1;i1  ion  of  (lie  ntstnnii;  tlic  li^a- 
iiu'IiIm!  aira  is  narrow,  <l('c|>.  and  lon^.  cxtiMKliiiji'  lor  ncaily  tlif  cniiic 
l«'ii<:tli  (iT  llif  doisai  niar,i;in.  and  is  dearly  dctincd  hy  a  niai'^inal  iid,ii(' 
wliicli  i^  .vli;ir|»t  r  on  tlic  Icl'f  \ai\«'.  In  most  spccinit'ns  tliis  \al\r  is 
inaikfd  l>y  a  slii;iit.  ill  (h-lincd  ^rooxc  rnniiin^'  IVoiii  tin'  ltral(  toijn' 
ant«'ro  Ncniral  Miar<iin.  wlinf  it  oltcii  loi  ins  a  sliyld cniarjiination.  hut 
is  oricn  scaifcly  disccrnil)!*'.  cNccpt  by  tin'  cliiin.ac  in  the  direction  of  tlic 
lines  of  'growth  and  cliaractcr  of  tlic  cpidcrnds.  'I'lic  sni'l'acc  of  tlic 
Icit  \al\c  is  co\-crcd  witii  irrciiiilar  coneciitiic  riducs  and  rallicr  iiiic\  en 
liiic>  of  L^i'owtli:  I  lie  riulit  vahc  usually  shows  rather  rcyiilar.  coiiecn 
trie  nndidations  on  which  arc  nnincroiis  line,  pretty  re,<iiilar.  lines  of 
growth:  this  vahe  is  also  usually  marked  lt\  faint,  and  rather  indis- 
tinct.  ladiatinii'.  impressed  lines  which  aic  more  or  less  broken  and 
often  branched  or  forked:  these  are  scarcel\-  visible  without  a  lens. 
l'!pi<lerniis  thin,  biownish  yellow,  usually  mostly  jiecled  oil  in  dry  speci 
mens,  inil  on  tlic  anterior  end.  in  front  of  the  radial  . 54 roo\-e.  it  is  a 
little  more  ])ersisteiit.  In  the  lelt  \al\«'  the  anterior  tooth  is  strong' 
and  prominent,  with  the  ])id\imal  end  the  thicker,  more  ele\alcd, 
rounded  or  clavate:  distally  it  is  ciiived  and  diverges  considerbly 
from  the  aiilero  doi'sal  mai.^in;  between  this  tooth  and  tlii'  resilial  pit, 
there  is  a  small  central  tooth  onl\-  a  little  elcxatcd.  'IMie  icsilial  pit 
is  (iii'cctod  obliipiely  backwai'd.  and  its  ca\ity  is  obiiiiuely  ui)tuincd. 
formiii.u  a  distinct  c\ca\'ation  011  the  inner  surface  of  the  posterior 
tooth  with  which  it  is  coiillncnt:  this  posterior  tooth  is  simjily  a  dis- 
tinctly thickened  ,iiid  slij^htly  elevated  ])ortion  of  the  postero-doi'sal 
margin,  which  forms  the  boundary  of  the  lit^'amental  area,  it  is  often. 
but  iiol  alwa\s,  o])])osite  the  position  of  t-he  resilial  ]»it.  In  the  ri-^ht 
vahc  the  anterior  tooth  is  a  slijihtly  raised,  somewhat  curved  ridnc  on 
the  inner  suit'ac*'  <d'  the  shell,  ruiiiiin<;'  to  the  nuddle  of  the  anteiior 
muscular  scar;  the  central  tooth  is  shorter  and  uuich  more  ele\alcd, 
most  prominent  at  its  inner  end;  between  these  two  teeth  there  is  an 
additional,  sli^litly  raised,  tooth-like  ri(l<;e:  the  jjosterior  tooth  is  about 
as  lou^  as  the  anterior,  and  uiueli  more  elevated  and  stouter,  its  distal 
end  bein^  the  thicker  and  hij^iier.  with  a  distinc^t  aniiuhir  summit;  the 
oblique  resilial  pit  is  e\(!a\ated  out  of  its  anterior  surface.  The  ossicle 
is  s<Mnewhat  elonuated,  curved  or  crescent  shaped.  The  interi<»!'of  the 
shell  is  only  sli^htl\-  lustrous  and  shows  but  litth'  iridescence. 

Leujith  of  one  of  the  larj^'est  specinuMis,  1!)  mm.;  liei<>ht.  II  iiiiii.: 
thickness,  about  .'i  mm. 

l''ouiid  in  (Muisiderable  uund)ers  at  twenty-three  stations,  n<iiili  of 
t'ape  Cod.  oil'  tStellwa.ueiis  Dank,  and  off  Chatham,  iu  JO  to  i-'J  fathoms, 
187"J-lSvSl. 

Tliis  species,  which  is  common  in  the  \icinity  of  ('a{)e  ( "od.  has  proli 
ably  been  contbunded.  hitherto,  with   <\  tritiiualu  Say,  and  C  //"»/- 
(liaiKi  Da II.     From  the  latter,  which  oecairs  abundantly  in  the  same 


I 


T 


i 


I 


r 


N  ..  ii;i». 


iu:i:r-ir.t  ri.i:  Mnij.i  si  \—\  i:i;i:ii  i.  .\si>  lusii. 


^■1 1 


icuioii.  it  (lilVt'is  ill  its  imirli  siiialltT  si/c.  miicli  less  iiidorcnt  iniriini'. 
str;!i.uliln-  imstcrndnrMil  iii;ii«;iii,  l«'ss  iiittiinird  I'dstniiii.  :iiii|  luirniw. 
(»!•  iiiiiif  Mcciiiiiiiiiitc.  |)Ostfrior  liiilt' nl'  tlu'slicll.  'I'lir  Iniij^f  iilsu  li jiit'i-s 
ill  sfVi'iiil  icsprcts. 


T 


C    ,T3 


KENNERLIA   BRF.VIS,  new  species. 

1  I'l.ltr   I.WWIII.    lius.  7.   .(.   /'.I 

l\(llllirli(l(,'(iri(lHn    \i:i!l!II.I,    Nolle  !■    (il     Iv'rrcnl    Aiiil.    In    M.ll.    IliViTl..    I't.L'.    I'loc, 
1.    S.    Nill.    Mils.,    111.     |l.    :!1I7,     iS>i;       TlMlls.     ((IIIM.    .\linl.,   \',     |).     :,t\-,     j.SKl';     \|, 

|i.  L'7T.  is,v|,  — i)Ai,i,.  IJiill.  r.  s.  N;it.  Mils..  No.  :;7.  |i.t'.s.  i,s,»^ii  i  in  ],,.|ii  i. 

Slu'll  si  Kill,  siihliiiiiilc.  vciy  iiic<|ilil;itcr;il.  iililiisciit  I'otli  ciiiis.  sliiilitlv 
iiiiri'owcd  aiilcriorly.  I'lic  iiiitcio  doisal  mariiiii  is  siiur!  and  slopes 
ratlu'i'  ia|iidi,\  lo  tlir  anterior  end.  wlieie  it  .onus  an  oi»t  ii>e  aii^le  w  il  li 
tlie  \eii1ial  niaruiii  wliieli  is  !iro;idl\  and  neai  1\  e\  enl\  idiinded.  and 
passes  into  the  rounded  p<)>terior  iiiar<;iii  w  itliont  anuiiiation.  hut  .some- 
tiiiies  witli  il  sli^litly  siiMioiis  eiir\e  helow;  then-  is  also,  .sometimes,  a 
\  (■:  y  sli^lit  sinuosity  anteriorly :  tlie  postero  doi'sal  niaruiii  is  nearly 
straiu'lit.  The  lelt  vahc  is  ratliei  eon\t'\.  iiiodei  alely  t  liicU.  nearly 
sniootli.  with  a  distinct,  narrow  ladial  rid^e  rmniiii;.;'  IVoiii  the  heak  to 
the  posterior  end.  The  lij^lit  vahc  is  smaller,  eonca\t'  or  nearly  tiat, 
lunate,  widest  behind  tiic  middle.  rcLiuiaily  eiiiNcd  \iMitrally  or  faintly 
sinuate  anteriorly  ;  its  siirl'aee  is  markeil  Ity  lines  of  growth  and  crossed 
l)y  ladial  grooves,  of  whieli  aboul  ten  are  \  ery  distinct,  while  many 
others,  mueli  liner,  can  he  seen  with  a  lens.  In  I  he  ii;..;lil  val\e  the 
liinue  consists  of  two  small,  diverjit'iit  teeth,  hoth  of  wliicli  are  directed 
posteriorly.  The  rather  thin,  elongated  posterior  one.  in  a  piotile  view, 
isoht"se]y  trianjiiilar.  its  hi,iihest  p(»int  ilistal  to  the  middle:  the  slender 
resilinm  is  attacdied  to  this,  nearly  the  whole  leiij^tii  of  its  anterior  side, 
and  carries  a.  loiiy,  narrow  ossicle.  The  cardinal  tooth  directly  under  the 
beak,  is  much  sliorter  and  somewhat  tliicker,  with  its  Iiiji'hest  point 
near  the  proximal  end  which  is  close  to  the  dorsal  mar<;in.  There  is 
also  a  sliiihtly  elevated,  rather  indistinct,  anterior  subinaruinal  ridiic 
parallel  with  the  mariiin,  whicli  supports  a  slender  lijiamental  <iroo\e. 
In  tlie  lelt  valve  the  liinji'e  consists  of  ii  siibmaruinal,  thickened, 
bbint  anterior  tooth,  runninjn'  forward  subparallel  with  the  marjiin,  and 
a  posterior  submai'j'inal  thickening  or  ridjie  havinj;- 1  he  resilinm  attached 
to  its  anterior  side;  the  V-shaped  space  is  relatively  very  wide  and  is 
not  divided  by  any  distinct  intermediate  li  lues,  such  as  occur  in  tyjiical 
I'tiiKliira.  The  resilinm  appears  to  be  simple,  not  divided  in  a  V  shaped 
form  as  in  the  latter  yenns. 

LeiijLitli  of  one  of  the  largest  specimens,  ll.-l  mm.;  height.  7  mm.: 
thickness,  .'>  mm. 

Found  in  small  numbers  at  about  ten  stations  between  N.  hit.  10'  1")' 
30",  \V.  long.  70  l!7  ,and  N.  lat.  :\rr  10'  10".  W.  long.  70  0'  10".  in  08 
to  100  fathoms,  ISSO-IS.SO. 

This  species,  which  is  southern  in  its  range,  is  closely  lelated  to  the 


H'22 


ri;in  i:i:niM;s  of  tiii:  \  trios  ii.  mi  si:im. 


Vol.  \\. 


noitliciii  A'.  f/l)(i'iiilis  iliCiicli)  witli  wliicli  it  was  rMimcily  i(l<'nlilit'(|. 
It  is  a  sinallri'.  sli((itei',  and  iiioic  iiillatcd  species,  witli  a  slKtilcr  ami 
more  slnpiiij;  aiitCMo-doi'sal  iiiaryiii  aii<l  a  uutvv  cn  ciily  <'iii\  cd  \  cut  ml 
niai'uiii.  wit  lidut  the  distinct  antcrovcnti'a!  indentation  seen  in  ihal 
species.  'I'iic  convex  valve  lias  a  distinct,  posterior  railial  lidnc  wliidi 
is  I'aiiil  Of  lackijiji'  in  A',  iilacitilis.  'i'liere  are  also  ditl'ercnces  in  tlic 
iiinyc,  in  tiie  ri;;lit  vaheol'  the  latter  tlic  te«'tli  are  nioredivcr<;cr»  .  etc. 
Doctor  Oarpcntt'P,  wlio  estahlisliecl  tlie  ^I'oni)  lunnnliii.  {\v\\\\v\\  ii  as 
«lil1'ci'in^'  iVoni  typical  I'ainlorn  in  lia\in^' an  ossicle  on  tlic  <"irt  ila;;(' ur 
resijinin.  aiui  radial  j^rooves  on  tlu'  rijilil  valve.  Teiiiaps  the  simple 
]iiie;ir  tbrni  of  the  rcsilinin  in  Kcintcrlia  and  its  forked  or  V-slmped 
form  in  triU'  /Vn/'/f*r</ i  type  /'.  rostata  I-amarcK  i  may  !«' of  more  iinpur- 
taiiee.  The  intermediate  rid^e  in  the  lelt  xahc  of  I'diulura  tits  hetween 
the  two  divisions  of  tlie  V-sliaped  resilium.  There  is  also  in  h'nniirliK 
a  small.  Imttress-like  projection  within  the  margin,  under  the  lieak. 
which  siippdi'ls  an  inward  projectiiij;'  ]>ortioii  of  the  lif;umeiit.  dai  kep 
ill  (Milor  t  hail  1  he  rcsilinin. 

Faniilv  PKRIPLOMID.K. 


PEIRIPI.OMA  AI^'FINIS,   new  species. 
I  I '1.1 1. •  l.W.WII,  liy.  I.) 

Shell  thin,  fragile,  broad  ovate,  with  the  beaks  behind  tlie  iiiiddh- 
and  with  a  short,  narrowed  p(»sterior  end.  The  antero  dorsal  mariiin 
is  broadly  coiincx:  anterior  end  nearly  evenly  roiind«'d,  but  slightly 
produced  in  tlic^  middle:  ventral  marjiin  evenly  convex  to  the  base  of 
the  rostral  re,i;ion  where  it  becomes  slightly  incurved;  posteiior  end 
iiuicli  nanow(Ml.  com})ressed  and  produced  into  a  short,  blunt  rostnini 
with  the  edj.ies  <iapin<;'  slij^litly  at  the  end;  postei'o-dorsal  iiiai'inin 
nearly  stiai.iiht.  sloping  rapidly  to  tli<'  anj^le  of  the  rostrum:  a  faint 
diauonai  iidi;e  extends  to  the  low<'r  rostral  anj^le,  ]>osteii(ii'  to  which 
the  shell  is  smoother  t han  elsewhere  and  marked  with  several  faint. 
radial  riblets.  The  j;eneral  surl'ace  is  covered  with  irrejiular.  uneven 
and  otteii  rather  faint,  concentric  undulations,  sejiarated  by  rather  w  ide 
concave  intervals  which,  like  the  elevations,  are  covered  liy  tiiin, 
elevated  lines  (»!"  <;rowtli.  The  undulations  ai'c  most  regular  on  the 
umbos  and  become  less  distinct  and  more  irrejiiilar  toward  the  inaivLi'in 
and  anteii(trly.  and  show  by  transparency  on  the  interior  of  the  shell. 
Tlu^  chondrophore  is  small,  but  very  prominent,  spoon-shaped,  naridw 
at  the  ba.se  and  i^xitanded  distally,  with  a  nearly  ronad  icsilial  pit. 
The  ossicle  is  well  develo])ed,  bent  into  a  crescent  shape,  and  so  Ibiincd 
as  to  lit  into  the  small  rounded  notch  in  the  shell  marjiin  in  front  of 
the  cliondro])hoies.  A  somewhat  elevated  submariiinal  ridiic  extends 
forward  from  the  notch  and  serves  to  support  the  thin  liuainent:  a 
similai'  but  less  i)rominent  ridye  extends  baidcwai'd  from  th«' choiidro- 
phores  and  delinesa  distinct  liganiental  groove. 


a^'K 


i 


Nm.  11:;!i, 


i)i:i:i'-i\  A  I  i:i;  Mni.i.rsi\i—\  i:i;i:ii.i.   i\i,  i;i  sii. 


S23 


l,cii;;tli  ot  till'  liU'^lisI  s|)(Tiiii('ii>,  l.lliilil.;  lici^lil.  Kliiiiii.:  tnca  ll  li. 
S  mill. 

'I'liiTc  spcciiiiriis  were  IniiiMl  ;if  tlin'c  stiitioiis.  (ill'  M ;n'l  has  \' iiicyani, 
ill   KMI  to  1  I.',  tiitlioiiis,  ISSO-Sl. 

I  his  species  reseiiiMes  /'.  iiiiili(liit<i  in  seiilptiii'e.  1)nt  the  latter  is 
iiaii'ower  and  loiijicr  in  lonii.aiMi  lias  a  more  decidedly  longer  rostiiim; 
its  chi<indi(>pii()i'e  is  siidrter  and  broader,  and  not  so  <Iistinet ly  spoon- 
shaped  distall.\,  wiiile  I  lie  niarj^iiial  notch  in  iVoiil  of  it  is  relatively 
lunch  smaller. 


^K 


S 


PERIPLOMA   UNDULATA   VerriU. 
(I'lllt.'S  I.XXIX,  liH.   1;    I, WW  II,  Wii.-,.) 
I'lrijiloiihi  iiiiiliihiid  N'i'.KiMii,    Ir.iiiH.  Cniiii.  Aiad..  \'l,  i)[).  111;!,   lis,  iss,"). 

.\  few  specimens  were  I'oiind  at  six  stations  botwoen  N.  hit.  .">!>  !>', 
\\  .  lon<;.  T.'.  ;?'  ir»",  and  N.  hit.  :W>  IL",  \V.  lony.  71  M)',  in  .111  to  ,sl(» 
tiithoms,  1S>S1-1S.S7. 

Family  LIMP) J<:. 

LIMATULA   REGULARIS.  new  species. 

Shell  small,  tliiii,  nearly  e(piilateral,  mncli  lii,i;lier  than  lon^'.  with 
the  liinye  line  straifilit  and  rather  lony.  rinhos  and  median  part  of 
the  shell  swollen.  l>eaks  rather  prominent,  directly  iiicur\('d.  Li,ua 
mental  area  relatively  laij>e.  elonj;ated.  diamond  shaped,  witli  the 
pointed  end  exteiidiiij;'  nearly  to  the  aii.ule.s  of  tlie  hinyiMiiarjiin,  with 
a  central,  more  sunken,  short,  rliomboidal  ligament  pit  which,  on  ii 
separate  valve,  forms  nearly  an  eiiuilateral  triangle.  The  anterior  and 
]iosterior  ends  are  nearly  e(|inilly  curved,  a  little  convex,  but  slij;litly 
nairowe<l  where  they  join  the  hinj;e  niarjiin  and  form  a  distinct  obtuse 
an.ule;  on  one  side,  sui)posed  to  be  anterior,  below  the  aii<;Ie  the  mar- 
jiin  is  sliniilly  incurved  for  a  short  distance,  inakin,u'  tliis  an.ule  less 
obtuse  than  the  (»tlier.  I'he  Neutral  mar<.;in  is  nearly  evenly  rounded, 
formin.u'  nearly  rlie  segment  of  a  cir<de.  The  surface  is  covered  with 
small,  elevated,  radial  ridges  sei)arated  by  concave  grooves  of  greater 
breadth;  in  the  middle  of  the  shell  between  ten  and  twehc  of  the 
ridges  are  distinctly  higher  and  thicker;  on  each  side  their  si/e  diiiiin- 
islies  outwardly,  so  that  near  the  angV  f  ^ue  hinge  they  become 
nearly  or  (piite  obsolete,  the  last  ones  being  mere  raised,  microscopic 
threads:  in  some  cases  smaller  ones  alternate  with  tlie  larger  ones,  so 
that  the  total  number  can  not  l»e  delini<^ely  (letermine<l,  but  titty  or 
more  can  often  be  counted.  There  is  olten  no  very  evident  median 
external  sulcus,  such  as  occurs  in  seveial  related  species,  but  the  two 
or  three  central  radii  are  often,  but  not  always,  distinctly  larger  than 
the  rest.  The  radii  are  crossed  by  very  line  lines  of  growth  not  sutll- 
ciently  strong  to  render  them  at  all  nodulose.    The  inner  margin  is 


'>  ! 


'"Wif 


«J1 


rj{nrr:r:i)r\<;s  ar  riir  \ iTii>\.\i.  }rrsnrM. 


\i>]..  \\. 


(listiiiftly  frniiiliilt'd  aloii;;  llic  pnniiiin'iit  Ncniral  cili^i'.  tln'  cn'mihi 
tioiis  corn'spoiidiiiy  to  tlic  «'Xt('riiiil  jjmovj's  iiixl  ridges.  Itiii  ;it  I  lu'  cimIs 
it  is  sinootii.  There  is  ofti'ii  a  distinct,  nuHliaii  iiit«'nial  yr()o\«',  cxiciid 
iiijn  iVdiii  iM'ai"  tlu'  ln'ak  to  tlio  middle  of  tlie  Neutral  iiiiii'j:iii,  hnrdcicd 
on  eaeli  side  liy  a  distinct  raised  i  id^'e,  sonietinies  lia\in;^'an  addiiioiuil 
j;roove  on  I  lieir  ontiT  sides.  Tin'  liiiij-e  niar^^in  is  ratliei'  thin,  in-ariy 
sfrai;:hl,  and  a  little  e\cavate(l  or  incairved  alonj;  t he liya mental  pit;  on 
eacli  side  and  considerably  within  the  nnir^in  there  is  a  small  trian<>'Mlar 
biittiess  or  shelClike  process  extenilinji'  to  the  anterioi'  and  posterior 
margins  as  in  the  allied  species,  hnt  rather  larjicr  than  usual. 

Lenyth  of  one  of  the  lar.ues*  :Mecies,  (»  mm.;   height.  !>.<•  mu'  •   thii^k 
ness,  about  .">  mm.;  length  <<f  hin^e  inar<4in.  ■">.<>  mm. 

A  niHuber  of  separate  \iUves,  station  L'L'(!."»,  N.  hit.  M  '  7'  l(»",  VV. 
Ion-.  71  ^  .".5'  4(»",  in  70  fathoms,  ISSI. 

'I'his  species  is  allied  to  LinnititUt  siihoiuitn  (Jelfreys)  Smith.'  which 
is  distinj^uished  by  its  sh(»rtci'  hinj^e  niar<>in,  more  contractc(l  I'diiii. 
wit h  strcmjicr  and  hijiher  radial  ril»s  and  well  niarked  median  sulcus. 
It  also  hudis  the  incnrvatuic  of  the  margins  below  tlu'  an;;les  <il'  (lie 
hinjjc. 

LIMATULA   NODULOSA,  new  species. 

Shell  sundl.  nearly  e(|uilaleral,  vertically  ovate.  luirrowed  al»ove.  with 
ii  comparatively  short,  strai.uht,  hinye  niarj;in.  I'mbos  prominent,  n 
little  ('(Mupresscd.  r>eaks  snnill.  a  little  prt)minent,  directly  ii  'ii\<'d. 
Surface  coxcicd  with  ladial  ribs  which  are  very  fine  and  ev(  '  tiic 
iintciior  and  posierio!'  ends,  but  in  the  middle  rej^ion,  becoi..  .uu<h 
sti'onj^cr  and  aie  rendered  nodulose  by  strongly  marked,  raised,  eoncen 
trie  lines  and  .urooves.  The  two  median  ones  are  much  stronycr  than 
the  others  and  are  separated  by  a  distinct  median  sulcus.  The  inner 
surface  is  nuirked  by  radial  rid{i,es  and  yrooNcs  of  which  th(^  median  ones 
are  much  the  stronger:  inner  margin  crenulate<l  \entrally  by  the  ends 
of  the  ribs  and  grooves.  Iagam<'ntal  area  diamond  shape  with  a  small, 
short,  rlioud)oidal  ligiimeut  pit  in  th<>  middle.  'I'hc  hinge  margin  forms 
an  obtuse  angle  at  ca<'h  end.  the  two  nearly  or  «piiie  e(|ual ;  internal 
buttress  well  developed  with  tlu  inner  margin  ri'gularly  curved  and 
continuous  across  the  nuddie.  so  as  to  thicken  the  hinge  in  this  part. 

Length.  !..">  mm.;  height.  7  mm.:  thickness,  about  I  mm.;  length  of 
the  hinge-margin,  L'  mm. 

A  single  valve,  among  Fora»ninifera,  at  station  2385,  N.  hit.  L'S-  rt\', 
W.  long.  S8"^  IS',  in  7:{()  fathoms,  ISS."), 

This  species  agrees  with  />.  .suhorafa  (Jelfreys)  Smith  almost  com- 
l)letely  in  si/e  aiul  form,  but  differs  very  de(!idedly  in  the  strong,  nodu 
lose,  radial  ribs  which  cover  the  middle  i)orti()n  of  the  shell. 


f 


T 


i 


'  Limwa  niihorafd  Ycrrill,  Notice  of  Keceut  Acid,  to  M:ir.  Iiivoit.,  J't.  L',  I'roi 
Nat.  Mu8.,  Ill,  p.  402,  1881. 


T 


NU.  11:10. 


liKEVnATiu  Miu.i.vsr.\-vi:ni;ii.i.  .ixi>  /;/■>//. 


•)r. 


1 


i 


LIMA  rUI.A    HYALINA.  ni-vv  spccie«. 

Shell  siiiiill,  tliiii.  tiiiiisliict'iil.  vt'il icuHy  oviito,  soiiicwh  il  .hli(|ii(», 
;iii(l  pi'odiKH'd  |M»sltMo  v<'iilri«ll\.  I  liriur-linc  strjii;;iil,  lathcr  shttit, 
ruriiiinji' ii  wt'll-iiniiki'd  aiijilr  :ir  cim'Im'IkI  owiiij;'  t»>  tlic  outliiic  oC  curh 
niiu'j;iii  iM'comiiij;-  soiiiowhnt  (concave  hclow.  lieaks  smsill,  ariiti',  in 
curved.  I 'mhos  proniiiiciit,  smooth,  hryoiid  which  the  >\\v\\  is  ciisi  leil 
with  iiiimcioiis,  ch'iirly  ddiiH'd.  ratlicr  sharji  radial  ridycs.  scparalod 
by  wider  concave  iiiter\als;  iVom  twenty  li»  t wen t>  live  oT  the  radii  can 
be  easily  counted;  toward  tlu'  jMistcrior  marijin  they  become  liiint  and 
indi.slinct,  wliil«>  the  extreme  marfiin.  on  l)olh  siiles.  is  snntotli.  'l'\\o 
anterior  marj^^in  is  broadly  i(»nnde<l  ;ind  slopes  ba(!l<ward  l)elow  tin- 
miiblle;  the  posterior  margin  is  nearly  strai^iit  <m' e\  en  a  little  inenrxcd 
in  its  u])per  half,  but  becomes  sb<ihtly  (ionvex  ix'low :  t  he  veiiiral  mar 
jfin  is  cNcnly  rouiub'd  and  tlie  edi^e  is  slightly  scalloped  by  the  radial 
ribs  and  furrows.  There  is  no  distinct  median  sulcus  or  larger  ribs. 
'I'hc  lij^ainental  area  is  rather  short  and  Inoad  with  a  r(datively  lar<;e 
and  thick  central  lijisiment  which  occupies  a  distinctly  excavated  pit  in 
the  hinj^e  nnirjiin. 

Length   of  one  of  tlie   larucst   specinuMis,  l.r»mm.;  lieii;lil.  7..")  mm.; 
thickness,  .!  mm. 

A   nund)er  of  live  s]»ecim(Mis.  amonj;'  I'oraminifera,  stations  L'.'ldT  to 
2MI,  X.  lat.  !'!»    +,  W.  loiiu.  S-.    +.  ill  LT,  to  21  fathoms.  ISS,'). 

This  species  somewhat  resemldes  LiiiKituhi  ctni/'iisii  Smitii.  which  was 
alsit  taken  in  the  north  Atlantic  and  West  Indian  areas,  in  ir»(i  to  l,l."t(i 
fatlH)ms.  Our  sp«'c,ies  is,  however,  more  compressed  and  more  ol)li(pn', 
and  the  radial  ribs  do  not  extend  to  the  extreme  mai'Liins  as  in  ihe  hit 
ter.  'i'lic  hinjic  inar.i:in  i  also  relatively  shorter  and  the  iiuamcnlal 
area  lar,!-'!'!',  so  that  the  beaks  aic  more  sei)arated. 


i 


82n 


I'Hoci'.i'inscs  or  Tin:  xtrmxti.  mi.<i:im. 


Vnl,.  \\. 


I'ECTEN    MuIUm',    I77('.. 


/'(■(7(»  (  Isf- s<M'(i(ni  1  Ki.KiN,  I7.">;{ -j-  /((/((. 

I'lctvt)   Ml  I. IKK.  I'roil.  /(m"iI.  Diiii..   177(1  {  fxo-.i].  -I>\('<)>|\.    177S.  •  Itoi  .ii-x,    17:1s 

(irsti  i(;tc(l  I,     ('i\  ii:ii,   17'.iH.      I.amai;<  k.SvsI.,  IsdI.      N  I'Mikii  1  .  I'laiis.  (  (inn. 

\i-.u\..     .  PI),  nil.  S'l.  ill,  |S!)7. 
.Iiiiiiru  >i  III   MAiin-i;.  ISI7.    -I>AI,1,.  ISSi;  (iKirfi).      h'l-i  in;!;.  I,ss7. 
loiii   II..1111I  A.  \iiAM^  (allir  K  1  i;iN  ».  l,sr>S. — Sidi  n  vk  \,  Mnn.  1  iculu^.  >iiiw\  ..i 

liiili;!.  ( 'ii't;i(((ins  I'l'lcix  |mmI   I'.iiin.i.  1 1 1,  p.  I.T,.  I,s7l .  -    /i  1  1  1  1,.  jwi 
/  iilii    I-  .lanird  CliKNT.  I.SIIL'. 

Ti/pc. —  I'fclrti  iHii.riiinis  (  LiinM'Us). 

Since  I'.oltcii.  ill  17!is,  (Iciiiiitciy  rt'slriclcd  Mic  iimiu'  I'rctni  lo  tins 
^^iniiii,  liis  icsdictioii   lias  itivcodciu'c  <»vt'r  thai  mC  S(liiimarli(>r. 

Tilt'  slit'll.s  aiT  i^ciicrally  larj^c  and  heavy,  and  thr  \al\('s  aic  vciy 
nin>(|iial,  even  when  xery  yoiiii.u'.  'IMn'  ri<;li("  \al\t'  is  slrnn-ly  cohm-s 
wilh  a  hir<ic  and  iiiiich  incurxcd  iiiiihn  and  hcak,  whih-  the  h'll  \al\t' 
is  Mat  or  cvrii  ('((iicavc.  It  is  nsiially  siiiallrr  than  tin-  rifiiit.  and  >hiit> 
<d(»s('ly  inside  of  its  scalhjpcd  mar,<;iii.  and  its  luiilio  is  nearly  01  i|iiiic 
obsolete,  'riic  aui  icles  are  of  iiKxIerale  size  and  not  ol)li(|iie.  anil  in  the 
ri,ulit  \alve  they  are  stroii<;-ly  convex  or  <'\ciir\ed  in  the  middle.  This 
vm1\(>.  lias  a  simioiis.  t'xcurved  l»yssal  notch,  with  obsolete  jx'ctiiiiijiiii 
tet'tli.  The  surface  of  both  valves  has  sti'oiij;-  radial  ribs  interlocking; 
at  the  margin.  Intenially  there  an>  anj^iihii',  thickened,  and  tinted 
radial  ribs  opposite  the  external  grooves:  these  ribs  become  mure 
proiiiincnt  and  biearinate  or  llnt«Ml  near  the  niaruins. 


■^ 


AM  USI  IJ  M    Holt.Mi,  I7M8. 

.imnsidm  l!ni.ii;\,  I71*s.  -  M  ini.i  ki  di.  1M  1 .— Si  iir  i  ai  iikk.  1s17.  Wi  hhiu  vi;i>, 
iSdC. —  I  >Ai,i  .  ISSi',.---  \  i;iaai.i  ,   finii.-.  ('nun.  .\iacl..  .\.  pp.  r>7,  im.  111*.  Is:i7. 

.ImiiKsiiim  11.  .111(1  A.  .\i>A\is.  IS.'iS  1 //(((x).-  Si(ii  K  VK  A.  Mem.  (icdioii.  Sni\.\  ni' 
iiKJia,  Crclaccdii.s  I'c1(H',vi>oiI  I'iimia,  III,  p.  iL'd.  Is71.  —  l'i-(iiii;,  l.>>7.— 
ZrrrKi..  18SI. 

I'ldii-Diiiriiii  Swain.  is|n.   -('iii;Nr.  1S()2. 

I'Hln'. —  AiiiKslinn  phiinmccfr.s  (  Lininciis). 

Ill  this  \eiy  distinct  yeiiiis  the  shell  is  round,  thin,  neai'ly  siikioI li. 
and  strongly  compressed.  The  surface  is  often  polished,  somciimcs 
lightly  radially  striated,  iiexcr  sti'on<;ly  ribbed.  The  niarjiius  aic  sim 
pie  and  thin.  'I'lie  val\es  may  be  a  little  uiiejjual  in  coii\e\ii\  and 
usually  dilfer  in  color  and  somewiiat  in  .seiil|»tiire.  The  \  ah  es  niiiie 
toj^etlier  venti'ally.  but  usually  ^ape  at  both  ends,  'j'lie  am  icle>  ;ire 
small,  syiiiinetrical.  neat  ly  eiinilateral,  often  with  lateral  crui;i  :  ilie 
byssal  notch  is  small  or  ab.sent.  pectinidial  teeth  nearly  or  ipiilc  ;iiior- 
tive.  Theadiill  pmbably  has  uo  byssiis,  llinj^'e-plale  simple.  Iiilciiur 
of  valves  sti'en},nlieiied  by  a  number  <d'  raisetl  di\erg'eiit  ribs.  01  lira', 
iiidepeiideut  of  any  external  sculpture. 


IC. 


J 


^"  "■"'  iii:i:i'-ii  .111:1;  M(>ij.rsc.i—iri,'i;i/.i,  .i\7>  /;/ .s//. 


S27 


CHLAM  YS    H..I1..11,    17'.>S. 


Cliliiiinis    l!i.iri:N,    Mil-.    Hull.,   l-i   cl.,   |>.  \t;:,.    I7;is,   ir-i  1  irtol.  — I'is(  ii|,:i;,    |,s.s7 

jliU  n). 

fii  Ini  Sriii  MACiii'.i.,  1M7  (  Kisi  1  irirrl  1.— \  i;i:i;i  1,1.,  I  raiis.  (  cim.  .\<a.l..  \.  |.|..  r.S, 

S!t.  HI,  IM>7. 
I'ifliii  I  iiiirs    ■.\\\t\  I'liliiniii^  I  pdi-s  \    II.    MMil    .\.    .\li,\Ms,    jS.'iS,      ('iiiM.    I.si'.'j.      /ii 

ii:r,.  \y-s\. 

I'lilrii   >  1 1  i|,|c  /l\  A.   JSTI    I  l(v-l  riclcil  I. 

7'///yr.  —  ('liliDinis  ishnitlicd  (Miilh'ri, 

Tlic  ori.uiiial  typrol'  tin's  ,y<'mis  is  identical  witli  /*.  ishnnlinis  (  Mi\]]vy). 
'riicrclun' this  sliniild  Itf  iiddptcd.  witlioiii  ijiK'stioii.  as  (lie  hue  tv|t<'.  as 
lias  iiccii  done  liy  l''isciici'  and  otlicis. 

T'lic  tyjiical  spcrics  o\'  ('lihiim/s  aft-  iiiuh.  rounded,  smnewliat  ()l>ii(|ne, 
(leail.v  e.|Uival\<'  shells,  with  lar.^c  in<'(|uilaterai  and  (>l»li(|iie  auii(  les, 
a  liii.ize  i».\S'-al  notch,  and  several  peel  inidial  teeth.  The  sinl'ai'e 
is  stronulv  railially  sculptured,  with  both  jiriniary  and  nniiieioiis 
interpolated  iil)s.  increasin.u  in  inirnl>er  \vit!i  aj^e.  'Die  rihs  are  jiener- 
ally  crossed  l)y  concentric  sciil]»l  nie,  olten  fbiiidii-;  i-ouiih.  scale  like 
projections.  The  mar-ins  are  scalloped  and  liie  shell  closes  rather 
tightly  (>\cept  at  the  hyssal  area.  The  inner  surface  has  ribs  and 
double  tliitiii;;s,  eorrespoiidiii!.:  to  the  external  .grooves  and  radii.  The 
hin.uephile  has  y-enerally  two  slii^htly  di\  crycnt  ril)s  on  ea<'h  end. 


ter^ 


J 


PALLIUM    S<liiiin:wli(M',   IS17. 

I'lilliiiiii  S(  iri  MA(  nil;.  |si7.     ll.anij   \.  Ai>am>.  ls.')S.— Ciii  \  r.  |si;-_' _  s  im  k /k  a 
ISTI.- Zii  iKi .   l.ssi.      I'i-(  III  1:.   l)ss7.~-\  i.ioai.i.,    Ir.-in-.  Cumi.  .\..mI.,  .\,  |i|i. 

r.!l.  Sil,  ill.  |,1.    \\|.   ;i;ir.  i,    |,S!I7, 

lu iiiijiiri, I,  i,'i  I'i'ii..  is;!"). 

V)//»c. —  rdlliinn  plica  (Liiiiia  iisi. 

'I'lie  special  leutiire  of  tiiis  Ncry  distinct  lii'oiij)  is  th<'  development  of 
several  iiisiially  threei  well-marked,  nearly  traiis\eise.  blunt  lecth. 
alteniatin.u'  with  distinct  jiils  on  eacii  end  of  the  hin.u-e-plate.  The 
shell  is  elevated,  rather  thick,  with  exiernal,  larjic  obtii,-,e  or  rounded 
ra'iial  rii»s  or  co;  nidations,  and  witli  intenial.  angular,  double  or  bicaii 
nate  rilis  opposite  the  cMeriial  -looves.  near  the  iiiariiin.  The  auricles 
are  small,  but  liiiih.  The  hin.-e  teeth  are  marked  vitli  distincl  cross 
lines. 

HINNITEZS    noCr'aiue,    1 82  I. 

Iliiiiiihs  \i;i;iaii,.    ri.in-^.  ('nun.  .\i  .111..  \.  ii)>.  .'.li,  >!i.  ill,  ]S!i7. 

Tfipr. —  /liiniih.s  i-<irh.ssi  Defiance. 

Shell  free  and   much  like  ('hidim/.s.  when   yonii^.  but    later  m   life  it 
be(!(tnies  attiudied  by  tiie  riuhi  vaLc  and  irreyulai. 


IHMIIMI 


828 


vnocKKinxcs  (IF  Tin:  x.iriox.ir  lAr.s/:/ ,u. 


Vdi,.  XX. 


HEMIF^ECTEN   Adams  nnd   Reeve,  1849. 
Ifrmii>iil<  II  \Ki;i!li.i..    1  raiiH.  Coiin.  A<;i(l.,  \.  pp.  (U),  .'>;!l.  !M.  lS!t7. 

Tj/jK'. —  lit  iiiijXilin  J'i>rlK'si(i>iuH  Adinii.s  aiid  K'ccvc. 
This  iiroii])  incliides  species  witli  thin,  irvcuular  sliclls  nttiiflicd  l»y 
(h(>  riiLjlit  \alv«'.  like  lliiniifcs,  but  the  al  tarhiiu'iil  is  cncctod  iiiaialy 
by  a  |i»'riiiaii»'ii1  iiio(lihi>d  l)yssiis.  The  postci'ior  aiirich's  arc  iicai'jy 
()))S()lctc.  'I'hc  byssal  iiotcii  becomes  irrej^idar  and  nearly  inclosed,  as 
in  .1  noniiii. 

PSEUDAMUSIUlVl    H.  nnd   A.  Adams,    l858. 
rnriiiliiniiinii()n  {  iKirn)   II.  and  A .  Adams,  i.^.^s  ( ,i ftcr  Ivi.i.in  i.  Cmknt.  18(12. — sro- 

IK/.KA.  lS71."-/aTlKl,.   ISMl.     -l"l-(IIF.l!.    1SS7.  — I  )A  I.I.,    ISSC  (;)(((•••*).  -\' i;i!l;  1 1.!.. 

Trail--.  Conn.  Acail.,  .\.  i>|i.  iH'.  W.  !•-!.  |il.  w  ii.  ti^■s.  S.  Sa.  ISHT  i  rcstricti'd  ). 

'l'i/}» . —  lsci(il(()iii(fii>i)ii  r.,()ti<-i(iii  (ClMMiinit/,.  Ijaniarck). 

Tho  tyi)i('al  species  ol"  this  jiroup  ha\e  nearb  -"nooth,  round,  syni 
metii<'al,  closed  siiells  with  well  delined,  small,  .  tij^ht,  obtiis<'an,L;lcd 
amiides.  The  valves  are  nearly  e(iujil  and  have  nearly  simple. 
even  inarj;ins.  The  external  sculpture  consists  of  small  radial  stria'  or 
ribk'ts.  without  stronj;  auiiular  ribs  and  grooves,  and  it  may  ditVcr 
on  the  two  vahcs.  Some  oi'  I  lie  s|)ecies  show  the  line  diveryiMit 
'■camptonectes  sculpture"  on  one  or  l)otli  valves,  especially  when 
youn.u.  The  mariiin  is  nol  scalloped,  or  but  faintly  .so.  and  there  are 
no  deliuite  iiitciiial  rib.s.  The  hinfjeplat*'  has  usually  but  one  iuni^i 
ludinal  fold  on  each  end  which  is  feeble  and  nearly  i)arallel  with  the 
niarjiinal  liuanu'utal  <iroo\('  and  is  usually  cross  lined.  The  b^s^al 
notch  is  small  and  the  pectinidial  teeth  vary  from  one  up  to  live  in 
nun»ber,  or  sometimes  nniy  be  iackiu};'. 

CAMPTONECTES   Moo!<,   1804. 

f '(/m/)/i)M('c/»'.s  Mkek,  istil. — Sroi.ic/.KA,  ISTl. — /aiTia,.  ISSl  (typf,  airiitilny  {iit\i\ 
I'n-H).  -   \  laaaii..  'Irans.  Conn.  Acad.,  .\.  pp.  d2,  !tO,  !tl,  IS'.IT. 

'/'///>'. —  ('(imi>ti>it(cli's  IciK  (Sowerby'i. 

Shell  siiboxaic.  plain,  not  corrujiiited.  and  without  strouiv  I'adial 
ribs:  marjjiii  nearly  plain,  \iil\es  snbeipial.  Auricles  unequal;  byssal 
notch  well  dcNcloped.  Surface  ol'the  shell  cover(Ml  with  line,  obli(pu'l\ 
diver;Li«'nl.  curved,  creiiulated  or  vermiculated  riiilets  with  inti'rvenin;;. 
iianow,  ]»unctatc  •:i'o()ves. 

'I'lie  curious  vermictdaled  seulpturi^  is  not  i»eculiar  to  this  division, 
but    is  more  or  less  ol',\  ious  on  the  shells  of  s(»me  species  of  I'si mhi 
iinisiinii.  ami  (»n  s|)ecies  of  se\eral  other  jjronps,  both  with  and  without 
ladial  ribs,     li   is  a  struciural  feature  that  runs  obliquely  across  the 
rtbs  and  .!.'.roo\es.     Most  of  the  species  are  Meso/.oie  fossils. 

The  recent  I'rcfru  filriatiai  and  /'.  tujr'nnis  Lanuirck,  (d'  llurope. 
apparently  belonji'  ti>  this  j>r<tui»,  and  /'.  tvsi(V  miy^ht  als(t  well  be 
referred  to  it.  The  latter  is  one  of  the  types  of  I'ttlliolion  which 
ndjiht  w«'ll  be  reoarded  as  a  8e«-lion  ol  this  genus. 


Nc.  II :!'.». 


iii:i:r-\\  A  ii:n  moi.u  sc.\~i  i:ni;ii.i.   ixn  /;/>//. 


X-J\) 


LYROF^ECTEN    Coiitnd,    IS(i7. 

I.iviijii  vU'ii  (d' si\  iTiil  1,1  tcr  aiillims. 

I.iinifici  l(  II  (liMtAii.  lS(t7.  — \  i:i:i;ii.i  ,    I' ran-.  Cunn.  Aiaii..  \,  pp.  c:;,  .S'.t.  Ml.  |S!tT 

/'///".  --l.!/rojK'chii  iiodosiis  ( I.iiiiiii'us). 

Shell  lai-.m'  and  strong-,  corni^i-iitcd.  w  itli  lar^c,  lliitcd,  and  ii.siiall.\- 
nodose,  priniary  radia.l  ril).s,  wliieli  do  not  increase  in  nundiei'.  and 
witli  coarsely  scalloped  niar<iins.  N'ahcs  somcwliat  unc'iual.  Ami 
clcs  of  niediuni  si/e.  nnc(inal.  I  lin^^c  |»larc  wiili  scvei'al,  usually  tli  (■(•. 
«>l>li«iuc.  divcrueiit  I'ihs  on  cacli  end.  This  is  one  of  rlic  hesi  delined 
.m'onps.  and  may  he  re.uiU'ded  as  of  y-eneric  value,  it  is  allied  to 
/'till  ill  III. 

PROPEAMUSI  II  M    (ii'tHjoiMo,    1,SS3. 

l'ii>ii<itiiiiisiinii    ( sllliiji'lius  I     D.M.I.,    r.lill.    Mils.    ('uui|>.    /iKil..    \\\,    )i.     JIO.    ISKll.— 

i"i--(  HKi!.  ISsT.  —  i.ycmiH)  \ki!1U1.i„   I'imuh.  Colli).  .Vcad.,  X.  ii|i.  i;i,  !t(),  i»2,  pi 
\\,  \\\i^.  r.-ii,  is;i7. 

7'///>c. —  I'ntjxiiniHsinin    iiicijiiisciiliitit   ('rilteri)  =  Proiiatiiitiisiinii   J'nics- 
Initiiiii  ( I'^orltes). 

This  uToup  is  allied  fo  A  iiinnii(i)t.  It  in<'ludes  small,  mostly  deep  sea 
species,  with  thin,  louuded  shells,  havin,^  the  \al\es  nne(|nal  in  si/e 
and  sculpture;  the  lower  and  tlatter  one  is  couc«'ntricaIly  <>roo\-ed,  and 
usually  turns  up  at  rlietliin  niar.uinto  meet  the  upper  \idve,  as  in  ('i/cln 
jintiii.  The  iippei'  valve  may  he  cam-ellated  or  radiall)  scul|)tured. 
When  lull  ,ur(»wn  there  are  several  well  Idrnicd.  laised.  internal  rihs; 
these  may  be  absent  in  the  youny. 

'I'his  division  dil'lers  tVom  AiiiKsiinn  in  the  sculpture  of  the  vahcs  and 
in  ha\in<;-  the  auricles  and  byssal  notch  well  developed. 

The  species  closely  resemlile  those  of  ('iifli>jii<'lvn  :   the  {\\\\\  olivious 
ditl'en'uce  in  the  shells  is  in  the  j»resence  of  inti'rnal  ribs. 


PALLI0LU1«   Monterosato,  1884 

I'liHiiiliiiii  ( .--iiliut'iHiw  HI    >(<lii)iii  \  i;i!iai,i.,  Trails,   (nun.  .Vfad..  X,   pp.  115, '.Mi,  lU, 
pi.  \\  III,  li^s.  (I   I  I,  ISMT. 

ri/jiis  (■itnl.—riillioliiiii   /r.s7rf' ( liivona)  and  I'nUinhiin    rilrrinii  (('hem 
nit/,  I. 

This  yionp  is  separated  IVom  l^stinhimnsiiini  II.  and  \.  ,\dams.  and 
<'an  scarcely  be  distin;;uislied  trom  (Jitiiiiitoncchs  by  any  i;nowii  cliar 
acters. 

The  two  species  named  by  its  autlnu' as  types  a^i'ce  in  ha\  iny  thin, 
rounded,  nearly  e(|iiival\((i  shells,  with  the  post«'rior  aiirid.'  poorly 
de\<'loped.  au<l  with  fine  camptoneetes  sculpture  on  both  vahes.  with 
small  radial  liblets.  and  usiiall.\  with  rows  (d'  small  scales.  The  mar 
uins  are  |)lain  and  come  evenl.\  together,  without  tlattenin.!.;-. 


■^  tJ 


■IMM 


S.'iO 


i'i;()ci:i:i)f.\(is  OF  Tin:  .v.r/vo.v.i/.  mi  skcm. 


\iii,.  \\. 


JEQUIPECTEN  Fischer,  1887. 
.I:il,iil„ri,„  (siil.-.'iiii-.  ..I  r/W„//(//.si  \i:iii:iii,,  Timiis.  ((inn.  .\<-ii.l..  X,  |.|'.  •'.'.'.  il?.  .^'.i, 

'.M.  i>i.  w  I.  lijjs.c-i  I :  |ii.  \\,  lius.  I-:;. r,. ti./.  ismt. 

hlfu. — .Vlijtiipicii  II  iijii  iiidiirix  I  liimiiftisi. 

siicll  Itriiiidly  icmiidcd.  witli  tlic  valves  iicinly  <'«iii:il  ami  synrnK'trical. 
Auricles  well  tiiriiM'd.aiijiular;  hyssal  notch  well-developed.  Tliescnlp- 
tim-  consists  of  a  inodei-ate  luiiiiber  (d"  lar,ue  and  nearly  ('(pial  primary 
nulial  ril)s,  wliicli  increase  in  si/.e,  l»nl  arc  not  mucli  increa.scd  in  nnin- 
ber  with  a,u('.  l»y  tiie  interpolation  of  \\v\\  ones.  Inteinal  rii)s  oi- 
tlutinjAs  correspond  to  external  grooves,  hut  each  one  is  hicai  inate  or 
aou\)le,  csju'cially  near  the  mar-ins.  Ilin-c  plate  with  one  or  two 
sli-litly  di\erj;ent  ribs  at  ea(di  end.  often  cros.sed  by  siron<i'  transveisc 
iiK  isioiis.  i'ectiiddial  teeth  abortive  in  the  type,  but  present  in  most 
spe<-ies.  The  foot  of  t  lie  type  species  is  subeylindrical.  well(lc\  t'lopcd. 
with  a  byssal  lissure  and  a  terminal,  deeply  bilohed  •' .scooped  sliaped  " 
disk,  which  can  be  expanded.  In  ./•.'.  irr<i<li(iiis  ^  the  foot  has  a  similar 
structuie.  bnt  tiie  ternunal  disk  appears  to  be  smaller. 

f^ECTlNELLA   V.'imm  11,  1  <S97. 
/•,,/;»-//„  \  i:im;ii.i.  liMns.  Cnnn.  \,a>\..  \.  pj..  (is.  !Mi.  !t2,  IMtT. 

riijH. —  rrriiiii Hii  sUisIki  (Daih. 

Shell  small,  thin,  swollen,  nearly  smootli.  with  convex  and  slightly 
unequal  vahes.  Auricles  vci'y  uneuual.  oblique,  the  anterior  hir-cr. 
with  a  <lccp  byssal  notch  in  tlie  riiiht  vahe.  but  without  pectiindial 
teeth:  jiosterior  auricle  small.  'I'lie  surface  is  smooth  except  for  line 
lines  of  jjrowth.     ( 'aini)t()iu'cte.s  sculpture  is  not   present.     The  texture 

is  not  hyaline. 

The  only  known  species  is  I'nflnrlhi  si(iNhci  (DallV  whi<'li  was  taken 
by  the  lihd.i'  Mxi)e(lition  in  the  \\'est  Indies,  in  \r,S  fathoms. 

LISSOPECTEN  Verrill,  1897. 

/.;.^^f>/((r/(»;  (Mil.jit  iin>  of  (hliiiiiiis,  \  i;!:i:i  1,1..  I'liiii.'^.  ('cnin.  A.M.l.,  X.jil'.f.S,  '.m.  HI. 
IS!  17. 

Tflpr. —  Lissiiprrtni  lii/oliuiis  <  Tolii. 

Shell  sli<ilitly  iiMMpiivalve.  broadly  rountled.  not  ultli(|Ue,  ihin.  trans 
liU'cnt,  nearly  smooth.  The  external  sculpt  nre  consists  of  fain!,  nearly 
ol».s(d..|c  radial  rid.^cs  and  obscur*^  I'iblcls.  init  one  or  both  anriclcs  may 
have  a  more  or  less  cancellated  sculpt  nre.  The  intericu'  .sculpture  con 
sislsof  very  distinct,  sinijde.  raise<l  ribs,  .\uricles  au,unlai-.  wcll-dcvel 
ojied.  r.ys.sal  notch  deep.  I'ectinidial  teeth  pnuninent,  Mar,yin  not 
scallopetl,  nearly  plain  ami  sirni»le. 

•  i'.idi.  .Mns.  loiiip. /••<"'l..  XII.  !>.  21';!.  \>\.  i\.  liy. -',  l?<'^"i- 


*^ 


Vc  J 


NO.  11 :'.!». 


i>i:i:i'-]v.\ri:i;  mollisca-]  Eintu.L  asd  hi  sii. 


H'M 


Alrlioiiuli  tliis  jjfrfMip  iiyrccs  witli  Aniirnhni/  in  Imxin^  intfrnnl  ribs 
willioiit  ('((iTcspoiKliiiii- cxrcnial  ^roovos.  it  seems  to  "he  nilied  r;iilier  to 
Clildiiti/.^.  il  may  l».e  icyarded  as  a  (li\isioii  of  tlie  latter  in  wliicli  tlie 
external  radial  lihs  lia\e  (leiiciieratt'd. 


W^ 


^ 


LEPTOPECTEN  Vorrill,  1897 

•.rjiliipi  (7.  /(  1  ^iili'^ciiii-    ttl'  Clihiiiiils  \   \  I  a;  i;  1 1,1,,    'l'r:nis,  (  diili.  A(;Mi .,  \,  |i|),  li',!,  S!l,  ;i| 
IMI7. 

Tjljif.-    I.<  ptojK  ilcii  iiioiioli  iinris  (('oiirad  . 

Siiell  ti:iii.  1 1  aiisliict'iit.  ol>li(|iie.  hiuailly  rounded,  with  siron"' 
rounded  radial  lid^es  or  folds,  like  eorrn.i^at ions,  wliieli  apiieai  in 
reverse  on  the  interior  snri'aee.  Tlie  internal  ribs  are  not  ani^idated  by 
a  deposit  of  shell.  m>r  dislinetlN  thickened.  Mar,i:iii  w  it  h  bioad  sea! 
lojt-.  The  exterior  snrla<'<'  is  covered  with  line  (li\-eioent  cainiitonectes 
,sciii|ttnie.  both  on  the  ril)s  ami  inter\als.  The  ribs  do  not  increase  in 
ninnbei'  with  aye  but  bee(»ine  broadei'  ami  more  tlalteiied.  .\iiricles 
lar-cand  In'oad.  t  hin.  corrugated.  Ityssal  notch  laruc  and  deep.  I'ee- 
tinidial  teeth  prominent.  I  linj^c  plate  thin  and  but  little  dil'ferent  iated. 
Cardinal  ridji'c  thin  and  snndl.  elose  to  the  ligament,  ciossed  i>y  tine, 
incisions. 


\fc.i-j 


PLACOPECTEN  Verrill,  1897. 
/'/,(,,(/)( ( Il  II  i  ->iiliuriiii-  111    <  'III dill /i-i  \  \'i:iaai,i,.  rr.iiiM.  (  iiiin.  \i  ,i(i,.  .\.  |i|i.  il'.t.  s:i,  ;)| 

|il.    \  \  Ml,  ll^is.  I  ~7  :    |p1.  \  \.  lii;H.  7.  S.  S((  ;    |il.  \  \l,  liii.s,  t    !'((,  |S!I7, 

Tiflx'. —  /'hii-ojifcli  II  cliiiloiiiiis  (Say). 

Shell  lar^e,  compi'essed.  broa<]ly  rounded.  ratluM'  thin,  with  simple 
sharji  ediics.  meetiiifj:  eveidy  veiitrally.  but  .yajiinji-  c(Misi(lerably  at 
both  ends.  es|»ecially  when  adult,  \  alxcs  oidy  slightly  nnetjUal  in 
form,  the  ri-ht  one  beiiij^'  a  little  Hatter,  but  t  hey  dilli-r  in  c(tlor  and 
somewhat  in  sculpture,  the  ri-ht  one  beinn- smoother  and  paler.  Txttli 
ha\e  tine  radial  lines  or  rildets.  and  they  ha\f  vei miciilaled  diver.ueni 
riblets  when  yoiiiit;.  .\uri(des  small,  symmetrical,  nearly  eipial. 
Hyssal  notch  ^;mall.  sim])le.  I'eclinidial  teelli  .uenerally  obsolete,  except 
when  yomii:-.  No  internal  rilis.  Inner  surface  often  with  more  or  less 
pearl)  luster  and  a  cr>  stallin*'  sirncriire.  Iliiiye-platc  wit  h  t  w(»  leeble. 
slii;lilly  di\-er'4eiit  rilis  on  ea<'h  end.  crossed  by  line  transxcrse  inci 
sioiis.  The  foot  is  well  develop«'d.  obliijue.  sliL^lilly  narrowed  distally 
ami  enlaii^ed  at  th«'  end.  wlu're  it  is  divided  into  two  l<d)es  by  a  rather 
deep,  oblitpu'.  lon.uiludinal  lissuie,  so  that  the  lobes  can  be  sprea<l 
ai»art  ()!•  closed  at  will,  thus  resembling  somewhat  the  foot  of  I.clidii. 
Tow  ard  the  base,  on  the  atiteiior  side,  there  is  also  a  -hort.  deep  byssal 
slit,  termiiiatiii,^  at  a  prominent  tubercle  about  the  middle  of  t  he  front 
side. 


I'lMiis,  (  iiiiii,  Aciil,,  .\,  pi.  \  \,  lig.  s. 


s;;2 


BS9B 


ri;n(i:i:iiiMis  or  rnr.  satiosal  miskim. 


V(II..  xx. 


CYCLOPECTEN    VciiMll,   1897. 


Cij,h>ii<iti  II  \i;i;i;ii.i..    I'laii^.   ('.piiii.  Ai;iii..    X.   i>)i.  7n,  IM),  ML',   pi.   .\  \  i,  lii;.   1;  jil. 
\i\.  lius.  1-1,  isitT. 

'I'lljus.  —Cjiclopi  cttii  jitisl  iiloKiis  NCi'iill  MiMl  Cyrlo/tcfhii  inilirij'cr 
{ L(»\i'ii). 

Slit'll.^;  tliiii,  iomikUmI.  scaiccly  ()l)li([iu',  with  syiiiiiiotrical  auricles  and 
siiiiitic  iiiai.uiiis.  'i'lic  two  valves  ai't^  unlike  in  s<'n]]»ture.  The  i'i>;iit 
vahe  is  a  lihle  liattened  and  n[)turne(l  at  liie  lie.xihk'.  niar|L;in,  so  as  to 
tit  ti.niill\- against  tlie  upper  \alv('.  Tiu;  tliin  h)\ver  valv«?  has,  in  the 
typical  spcci(>s.  rc_i;iilar.  tliin.  ch'vated,  concentric  lanu'lhe,  wliich  aid 
in  tlic  adaptation  ot  the  edjie.  to  that  of  the  upper  valve;  the  maruin  is 
usually  liattened  or  bevelled.  The  upper  i  lel't  i  \alve  is  radially  scidp 
tuicd,  larely  smooth;  it  usually  has  radi.il  lows  of  arched  scales, 
l)nsiiiies.  or  points,  and  also  coneentri(^  raised  lines:  it  is  sometimes 
cancellated.  Ni>  radial  rii)s.  nor  iuterlnckiu<;'  points  at  the  margin. 
Anri(  Ics  well  developed,  subeiiual,  annulated  and  well  deliiu'd  at  l)oth 
ends;  hyssal  notch  welldelined:  lew  or  in»  pectinidial  teeth,  Cardinal 
folds  sin.ule,  ratliei'  feebly  developed,  often  cross-lined.  Myes  few, 
l>yssus  small,  aiul  of  few  threads. 

This  ucnns  includes  a  larjuc  nnndier  of  small  species,  mostly  ironi 
<leep-water. 

HYALOPECTEN  Vcr-iMll,  IS<)7. 

Ihiiihijii  ill  II  \'i  i;iai  I..   Tiaiis.  (niin.  Ar.ul..  \,  |i|).  71,  !Mi,  ;il',  pi.  wm.  liu.  5,  |sii7 

Tj/in. —  Jhi(il<)ji<<-ti  II  iniddliis  Verrill. 

Shell  compressed,  thin,  hyaline.  N'alves  nearly  etpuil,  with  concen- 
tric undulations  or  con'u.uatious,  atl'ectinj;'  the  <'ntire  thickness;  niar- 
ji'ins  simple;  sculpture  iu)ne.  or  consisting'  of  tine  radial  lines  on  one  or 
both  vahcs.  without  canii>toiu'ctes  sculpture.  Ilinj^e-plate  thin  and 
nearly  plain:  auricles  wcll-dexclopcd,  nne(jual;  bys.sal  notch  distinct. 

I'or  the  possible  relation.s  of  this  j^rou])  to  the  Mesozoic  f;enus.  Si/nci/- 
cUntcmn.  see  the  orii^inal  article. 

The  species  recorded  are  as  follows:  //.  ilihctiis  N'errill  and  liush, 
fiom  I. Si;;  fathoms,  off  .Marthas  N'ineyard:  //. /)vf/////.s  (.leffreys,,  fiom 
northern  Murope  and  the  Arctic  Ocean,  and  off  the  I'nited  Stales 
coast,  in  '>'!^  to  \  .~)'2'>  fathoms;  //.  iinihitii.s  N'ei'rill,  oil'  the  liiiled 
States  coast,  in  l,l'J.>  fathoms;  and  U.  pudiiiix  (Smith),  olV  .Marion 
Island,  in  l,.'>7o  fatli(nus. 

PAK'AMUSIUM    Vt>fnll,    1897. 
I'liiiiiniisiiiDi  \KHiai.i..    rr;ni>.  Cuiir,.  Aiad.,  .\,  pp.  72.  1M>.  '.I'J,  1H!)7. 

'/'///«'. — PdniiiiK.siiiiii  thilli  (Smith).' 

Shell  thin,  roiinded,  much  eonii)resse(l:  valves  nearly  equal;  sculp 
ture  Ui'aily  ol>Noh'te,  dilferent  on  the  two  valves;  the  lower  vahe  with 
eoiu'cntric  undnlafions.     Aui'icles  \«'ry  snndl,  e(|ual.     Uyssal  notch  and 

1'.  iliilli  raiiuis  t'nmi  tln^  (oilf  af  Mcxicii  to  I'.arltailus.  in  21S  to  1,.">'J1  futlioiim. 


\ 


«.,■*• 
1 


!i 


1 


Nil.  II. ■111. 


i>Fj:r-n  A ri.u  Moj.r.rs(A~]-i:i!i!ii.L  .ixn  nu.sji. 


S.-^S 


|)0<'tilii(liul  fct'tli  obsolete.  Tlie  sliell  lius  ii  ]»ii,siii;itie  s|  iiietuit'.  Iiitcr- 
iiiil  lii'je  iiiid  aiirieiiliir  <Turie  \vell<Ie\("l(»pe(l. 

'I'lie  struelure  (tf  the  iiiiiinal  was  descrilxMl  by  Mr.  Dull  as  \(>i\  dif- 
ferent iVoiii  that  of  rypical  .h//».s//////.  Acfordinii  tn  his  description  it 
lias  ii  single  pair  of  jiills,  with  Ioii<;-.  siinplc,  scpaiale  lilaiiieiils.  'fhe 
fool  is  sh'iider,  with  ji  byssal  jiroove:  tlie  end  is  iniicli  enlai.yed.  with 
an  obli(|iie,  exjjanded,  concave  terminal  disk,  striati'd  within.  N(» 
hibia!  i)alpi.     OceHi  without  pij^inent. 

A  specimen,  well  preserved  in  alcohol,  exandncd  by  us,  had  !  w  u  lows 
of  lonj;',  slender,  retlected  uill-lilameniN,  as  usual  in  this  lanuly.  They 
were  attached  to  a  broad  basal  mend)raiie,  with  a  free,  limcolate.  pos- 
terior portion.  Two  pairs  of  1)road,  luliaceous,  incnived  palpi,  linked 
with  dark  biown.  Those  of  the  anterior  \nu\  aie  united  into  a  hood 
over  the  mouth;  the  otlun'S  are  smaller,  curved  inward,  somewhat  lan- 
ceolate at  the  tips.  No  ocelli  coidd  lie  found.  The  jiallial  tentacles  are 
all  in  one  row,  numerous,  <d"  various  sizes:  from  four  to  si.\  larue  ((ues, 
with  as  many  alternatinj;'  small  ones,  correspond  to  each  larger  undu- 
lation or  scallop  of  the  inantle-nmrfiin.  Xo  yuard  tentacles.  Muscular 
pallial  border  is  broad,  thickened,  radially  stiiated.  forndn<;-  a  lidnc, 
as  i)reservcd,  but  m)t  tentaculated.  I'ree  portion  of  rectum  loni;  ami 
slender. 

A  .syno])sis  of  th(}  iV^ctinid.e  was  recently  published  by  l)r.  I'rcderico 
Sacco.' 

He  recognized  three,  <;enera  :  ChUvmjix.  Amiissiinn,  and  I'rilnt.  with  the 
same  types  oiven  by  Verrill.  I'nder  ('hlinuj/s  he  giv<'S  nine  subj^cnera. 
Of  these,  I'our — r///((/Mj/,s' (restricted),  lliniiitix,  .h'tjidpt elm,  nui]  I'aH'io- 
hnn — cori'cspond  with  the  j^roups  of  the  same  name  liiveii  by  Nerrill; 
Friipc.s  Locard  (type,  prsj'clis  L.),  I'cplum  Buc(|Uoy,  l)ant/.enl»er,<;.  and 
DoUfus,  1889  (type,  inji'xum  Poll),  MavroclKilmix  Sacco,  1S!>7  (tyi»e,  lat'iN- 
siiiKi  IJrocchi),  FIcroitccHn  Sacco,  1897  (type,  //r,///o.s/(.s'  I'oli),  Lissoclihinii.s 
Sacco,  1897  (type,  ^'.rc/.sv(  l>ronn),  are  additional  to  those  <j;ivcnby  N'eriill. 

Under  ^l/«M.s',s'Mr»i  he  has,  besides  the  typical  yrou[),  tour  suhi;t'nera. 
Of  these,  two  are  new — l*ar  ram  nasi u»t  Sacco,  1897  (tyi)e,  (luotleciuihain  I- 
Utfum  lirouii),  Varinmii.sxium  Sacco,  1897  (typi',  cnncrlhilinn  Si^hnddt). 
The  two  others  are  I'ropeainiiNsiuin  and  I'.s(  ii(}<iini(s.siinn. 

The  three  new  subgenei'a  of  rrrttn  are  Aiiiussioixricn  Sacco,  1897 
{ty \)V,  hurdii/alriisiN  Lauuirck);  Oopvcten  Sacco,  1897  (type,  ntfiniddfus 
Lanuirck);  and  Fluhclliprrtcn  Sacco,  1897  {ty\H'',  Jhihi'lll/'onnis  Iboechi). 


'  Holletiin)   ilci   Mum.  Zool.  od   Aniit.  ( 'oiiip.. 
iijipanMitiy   issiuMl    nt    alioiit    tlio    saiiir    liiiit^ 
ahstriittfil. 

i'roc.  2s'.  .M.  vol.  XX ~y<i 


'iii\ .  (li    'rnrinii.  Ml,   p.    Idl .      Ii  \v;is 
a.s    ilial     1)\     I'rul'is.Mii-    \t'riill.     Iii'it) 


H 


I 


s:vt 


rni>('i:i:i>i\r,s  or  riw  xtrroxtL  }frsi:r)f. 


VOL.  XX. 


CHLAMYS  BENEDICTI  Verrill  and  Bush. 
,Pl;iIr  L.\.\\I\  .  liKS,  ],'2.) 

CliUntnin  111  iiiili'  li  \  i;i;i;ii  t.  mill   llr-ii.  in  \' i  Kiii  i.r  .  rriiii^;.  < 'iniii.  Ar;iil..  \.  ii|i.  71, 
;M,  iSiiT. 

Shell  .siiiall.  lii,i;lici'  tliaii  Imi;!;";  ;iiil»  rior  uiiriclc  iiiiicli  liirj;ri-  tliaii  tlu' 
posterior,  witli  a  <le('|>  l)ys.siil  iioteli    in    the   lower  or  ri;;hl  viilxe.     'I'hc 
<loi  sal  iii;iruiii  is  sti'aiii'ht  ami  la  it  sli^ihOy  oblifpie:   t  he  |»osleiiof  auricle 
ill    the   ri.uht    \al\c    is  decidedly  aiij;iilar,  witli    its   outer  end    sliylitly 
in(Mir\('d  and  seriated  l>y  the  teriniiiation  ol'  tlie  radial  ribs:  tin' ante 
rior  auricle  is  c<)iisi(leral)ly  prolonitcd.  anj,nilated  at  I  lu' upper  comer, 
obtusely  rcamded   at   tlie  end   and  deeply  iiotclied  wliere  it   joins  the 
main    shell:    it   has   four  strongly  marked   radiating   ribs,  iiesides  (he 
dorso  marginal  Ibid;  below  llies«'  tlii-re  is  a  s]ij;litly  concave  space  eor 
respondiiii:'  to  tlie   l>yssal   notch:  on    the   liody  of  tlie   shell    there  are 
iVoiii    lour   to   seven   sharp   serrations   aloiiu    IIm^   lower   margin  of  the 
notch.     Ill  the  upper  valve  the  anterior  auricle  is  broad  and  decidedly 
;infiular.  the  dorsal  ami  outer  mar.uins  fonniiij.;'  less  than  a  rinht  auulc; 
its  surface  is  eoNered  with    li\('  or  six  sti'<tiiL;  radiating'  rii»s  deciissaletl 
l)y   more   nuiueroiis.  liner,  concentric    raised    lines.     The   anterior  a!iil 
l)osierioi- mai'.uins  ol'  the  body  ol   the  shell  >lope  ab(»iit  etpially  and  (briii 
an  acute  aii.uli':  the  ventral  iimi'.iiin  forms  a  leiiulai' semicircular  cur\e. 
Tlu'  entire  surface  in   both  valves  is  crossed   by  stroiiuly  raised,  ratlici 
close,  radiating'  ribs   separated   by  latliei'  wide,  deep   y'rooves  and   are 
decussated  by  rejiulai'.  raised, concent  ric  lines,  which  are  scarcely  appai 
cut   on    the   ribs,  except  on   vei'y  yoiiiij;'   shells,  but   there   are   latlici 
strong;',  elevated,  spine-like  iioiiits  arranu'ed   aloni:'  the   ribs   in    prcti\ 
reuulai',  coiuentric  lines,  especially   near  the   marjiins;   these   itecoiiir 
lii<ihei  and  more  ])ointed  anteriorly  and  are  freipiently  nearly  obsolete 
in  the  ii'iddle  portion  of  the  lower  \al\«':  the  ribs  project  at   the  iiiir- 
gin  as  blunt  ])oints  or  serrations;  cm   the  inner  surface  there  are  laiiial 
grooves  corresponding  to  the  external  I'ibs.     The  hiiige-margin  is  tdiii. 
with  a  slender  ligameiital,  submargimil  groove  and  a  small,  tiiangiilar 
resilial  pit  in   the  center.     The  coloi'  is  variable;  the  siiigh>  valve  I'loiii 
station  1*571  is  unilbrm  lemon  yellow:  those  from  the  otiiei'  localitv  are 
ehestnut  or  reddish  brown  and  variegated  with  paler  and  soiiHinnes 
white  blotches. 

Length  of  the  largest  specimen,  ."i.o  mm.;  Iwiglit,  »>  mm.;  leiiLiili  of 
doi'sal  margin,  I  mm. 

A  few  live  young  specimens,  among  l''oraminifera,  .stations  I'-iti'.'  to 
2."i7-l,  in  L*r»  to  L'T  fathoms,  and  a  single  valve,  station  ifo'l,  in  I. •>">'> 
fathoms,  ISS.'t. 

This  species  is  ii  typical  ChUnni/N,  allied  to  C.  rnria  of  iCuropc,  but 
when  t omparod  with  young  of  that  species  of  the  same  size  the  radial 
ribs  are  found  to  be  fewer  and  coa.rser.  and  there  are  other  dilit  leiiceH 
which  r<'nde!'  it  piobably  that  they  are  distinct.  It  dilVers  I'lii  I  lie 
young  of  ('.  islainlicd  in  the   number  of  ribs  and   slia[)e  of  tlit  aiiritdes. 


«.^ 


r 


NO.  li:i!l. 


iii:/:i'.ir  I  ri:i;  y<i/  rjs(j—ri:in;ir.r.    im>  ursii. 


S3; 


.') 


M 
\ 

ic 
tc 


k 


r 


It  is  i)r()l)iil)h',  liowever,  tlijit  it  grows  t<»  ii  iiiiifli   liiigt'i'  si/c  ilum   an.N 
ot"  tlic  siK'ciiiu'iis  obtsiiiH'd. 

it  is  iiiuimmI  ill  honor  ol"  3Ii'.  J-iincs  V..  Hcucdict.  lor  sfNcral  vcars 
/oiilojiist  ill  cliiirjii' on  tlic  steiiincr  Alhnlross^  tliioiinii  w  iiosc  carr  ;iini 
jiii'iil  interest  so  iiiiiiiy  sinall  spftirs  urrc  hrou^lit  to  liulil. 

CHLAMYS  COSTELLATA  Vcirill  and  Bush 

(I'lalc  I, WW  I,  li--.  (!.) 

CliUimiin  lonlilliihi  Viaaiii.i,  iind  Hrsn,  in  \  i;i!iai.i..  Tunis,  ('uim.  A(  ••hI.,  N  .  |i|..  T."., 
ill,  18!t7. 

Slicll  small,  tliiii.  transliiconr.  blnish  white,  covered  on  hotli  viihcs 
witii  cuiitiniioiis,  elevat<'(l  and  soiiiewliat  tliickeni'd.  well-separated, 
riidi!itiii.u'  riltlets,  of  wliicli  tiiere  are  more  than  thirty  in  the  lett  valve 
of  tlie  larp'st  example.  lAMi^th  (d"  the  sludl  eoiisi«lerahly  less  tiian  its 
heijiht.  Dorsal  hin^e-inaryin  (donjiated.  especially  on  tiie  anteiior  end. 
In  the  rijilit  valve  the  anterior  auricle  is  consideraldy  elongated, 
obtusely  rounded  or  suUt runeated  at  the  end,  with  a  wide,  an^idar 
byssal  noteli  beneath  it,ha\ino-  two  or  three  ))eetiiiidial  teeth;  it  has 
a  broad,  smooth,  anj^ular  area  ne.xt  the  body  of  the  sliell,  abo\-e  wiiieli 
there  ai'e  three  well-marked,  aiifjiilar,  ladial  ridj-es,  separated  by  wider 
eonea\<'  interspaces;  theimsterior  aiiriide  is  small,  triani^ular.  the  outer 
corner  formiiifi^  a  little  more  than  a  rij^lit  anjile.  and  the  p(»steriui  mar- 
,i;in  iK'arly  straight,  without  any  distinct  notch.  The  dorsal  mariiinsnf 
the  l>o<ly  uf  the  shell  are  nearly  straijiht  and  diverj^e  at  less  ilian  a 
rijilit  an.i^le:  the  \entral  mar.uin  is  i)retty  evenly  rounded,  a  little 
]»ro<luc«'(l  in  the  middh\  The  beak  is  small,  acute,  ajjpressed,  and  does 
not  project  beyond  the  marjiin.  The  radial  ribsaic  very  distinct,  elean 
cut,  thickened,  rounded  at  the  sumndt.  separated  by  nearly  smooth 
intervals,  two  (»r  threes  times  as  broad  as  the  rit»s  themselves:  the  ribs 
increase  rejiularly  in  width  from  near  the  umbo  to  the  maij.rin;  a  few 
intermediate  ritlges  comnu'iice  near  the  nuirj;in.  The  left  \al\('  is 
badly  broken:  it  is,  however,  somewhat  more  convex  than  the  oilier, 
and  tlh'  I'adial  ribs  are  crossed  by  nunn'rous  concentric  striations  yiviu};' 
tlu'iii  a  liiudy  crenulated  or  beaded  appearance:  the  aiitciior  auricle  is 
broad,  trianj^ular,  the  outer  end  slij^litly  roiinde<l,  with  a  slif>hl  incurved 
notch  below;  it  is  crossed  by  about  six  small,  radial  ribs,  similar  to 
those  on  the  body  of  the  shell;  raised  lines  of  jiiowth  also  occur  at 
irii'iiular  intervals.  Inner  surfa(!e  smooth  and  lustrous.  sliowin<:  the 
grooves  correspondin<i'  to  the  external  ribs  and  also  a  very  distinct 
microscoi>ic  structure,  but  it  is  destituti'  (d' radial  hr.e.  Internally,  the 
hiii<;('-mai'!nin  is  thin  and  narrow,  with  a  sharjily  imjtressed,  sul>!iiar- 
ginal  groove  on  each  side;  the  resilial  pit  is  excavated  in  the  margin 
of  the  hinge  itself:  the  anteriiu-  auricle  has  int<'rnal  grooves  coitcs)  rind- 
ing to  the  external  ribs. 

Length  ui'  the  largest  specimen,  <>  mm.:  height,  it,~>  mm. 

Tlii'ce  live  specimens,  at  two  stations,  olf  the  (irand  r>anks.  in  (17  to 
72  fathoms,  188.J-8G. 


lil 


83r; 


ri:oti:i:iu\(;s  or  riii:  smiosm.  miseim. 


Viit.  XX. 


HYALOPECTEN   DILECTUS  Vcrrill  ami  Bush. 

(  I'liiti'  \CVII,  lin.!l.') 
Ililiil<>iif<ti  II  ilihiliiK   \  I'.uiiii.i,  ^iml    l!i->ii.  ill  N'l'iuiit.i,,   ri'iiii>.  < 'oiiii.  AcMil.,  \,  )i)i, 

SIm'II  siiiiill,  lliiii.  iVaj^ilf,  stronj-ly  iiiKliilatcd,  sli^-litlv  ohliijiu',  with 
(lie  \»'iiti;il  iiiiii'uin  hroiully  roiiiHlcd,  dorsal  marjiin  slruijilit.  In  tin* 
liulit  \iil\f  till-  iiiitt'rim'  auricle  is  ratlicr  narrow,  (don,nat»'d.  witii  a 
deep  anji'idar  notcii  beneatli;  (lie  posterior  auricle  is  sliortcr.  with  a 
prominent  doisal  anjile  which  is  less  than  a  lij^ht  anjjle.  owinj;'  to  tini 
cnnir.uination  ol'  the  posterior  end.  In  the  left  valve  the  anterior  auri 
cle  is  Itroad.  wiili  its  posterior  end  nearly  rectilinear,  and  forms  a  ri;;lit 
allele  with  the  dorsal  margin;  the  posteri<tr  auricle  has  a  slightly 
jMoinincnt  dorsal  aiijile ami  posterior  enuirj^iiuition  as  in  theri<;ht  valve. 
The  heaks  ar«'  a  little  pronuuent  and  project  somewhat  above  the  dor- 
sal mari^in.  more  in  the  ui)per  or  U'ft  valve.  Tlu' surtac*'  in  both  vahcs 
isco\('red  with  broad  and  rather  regular  undulations,  which  are  most 
prominent  in  tlie  left  \al\'e,  and  are  crossed  by  rej;ular,  well  spaced, 
thin.  laistMl.  ladial  lines,  which  become  line  and  more  i-rowded  at  the 
ends  of  the  valve;  they  are  nearly  obsolete  \\\  the  x\\f\\\  valve,  beiii'-' 
repr«'sented  by  micioscopic  stria-.  In  both  valves  the  anterioi- auricle 
is  markid  ^\<  several  fine,  roujih,  radial  rid<>es  which  are  stronger  and 
more  numerous  in  the  lelt  valve.  The  interi(U'  is  strongly  undulated, 
and  the  lett  \alve  is  marked  by  distinct,  radial  grooves.  Kesilium 
small,  (-entral.     Color  yellow,  or  dirty  white. 

Len.uth,  S  mm.:  heiyht,  the  same. 

One   live,  impel  feet  specinu'u   (Ko.  .jL'oiJ!)),  station  L'oTO.  off  Marl  has 
\  i^ieyaid.  in  l.Sl.)  fathoms,  ISS.'i. 

This  <necii's  is  closely  allied  to  /fi/olopecteii  frdtjilh  (.lelVreysj  and 
resembles  very  nearly  his  lifjure,'  which  probably  represents  a  species 
distim-t  from  the  ori;.>im«l  type  described  by  him,  and  may  be  identical 
with  oui'  sliell.  The  latter  dilVers  decidt'dly  from  the  ori<;imd  descrip 
ticHi  of  //.  l'i-n(iUis.  Moreover,  we  have  obtaiiu'd  from  several  stations 
a  shell  of  similar  size  which  appears  to  be  the  true  _//v(/////.v,'  as  it  a,yrees 
closely  with  1  he  description.  Uj/Kloitccfcii  />»f//c*/.s' (Suutli)  from  east  of 
Marion  Island,  in  1,.'{7."»  fathoms,  is  a  closely  related  species,  as  is  also 
Ilj/ttli)jn(irii  iniddlKs  Vcrrill. 

These  four  species  a^ree  in  havino'  the  valves  thin  an<l  ti'anslucent 
ami  sculptured  with  distinct  c(uu'entric  umlulations,  while  the  radial 
sculpture  does  not  form  stronjj'  ribs.  They  seem  to  be  related  to  the 
j>enus  or  subjicnus  Si/iirycloiicma  INIeek,  which  was  based  on  a  cix'ta- 
i'cous  sjiecies  and  has  not  hitherto  been  reported  as  still  livinj-'.  Mat 
theexact  characters  of  the  typical  fossil  species  are  not  yet  known. 

'  I'rnc.  /oiil.  Soc.  Loiulon.  pi.  \l.v,  lig.  1,  .liiiio.  1S7!(. 
The  I  rill'  lliiiilopcrli  II  I'raij'ilix  (,lcll'i'c,\s)  was  takt'ii  :it  tivn  stations  Ix'twccn  N.  lat. 
Id    (;  .  W  .  loiij;.  t;s     I   'My  ,:iml  N.  lat.3:>     l!>   ;{()",  W.  long.  71    :il    IT.   ,  in  578  to  l,r.jr> 
lat  bonis.  ]"8a-18><(i. 


I 


(Kj'S 


T 


f 


NO.  113it. 


i)i:i:i'-}y.\ri:i:  moli.i  sr.t-  i  i:i;i:iij.  am,  itisii. 


83: 


CAMPTONKCTKS  GRCENLANDICA   ,  Sowrrby  i  Vt-rrill. 

(I'lMlr   L.W.W  .  li«.  7.) 

P(r<<// /yr(i»(/flH(/i'»/»  Sowi  :i{m  ,  TliisMiiniH  '  (mcli.N  liornin.  I't.ii,)>.  nv.pl.  \iii,  lijf. 

1(1,  IHI'J.  -  Il.\vi.i:v.  l.'.(  iiil  SliilU.  p.  L'Tl,  IML*  In  is.-.d.— .1  ki  i  iji;\  >,  Ann.  mimI 

M.iji.  Nal.  lli^lnrv.  )>.  L':;i.  IS77. 
I'iclfli    iiiiiiiUlUiliiiin   (i.    ().    SaI!S,    Mull.    licj;.    .\l<l.    Nol'Vc;^.,    |i.   L'!!,    |il.   J.   liii^.   |, 

a-i ,  1H7S. 
I'ecleii  firii  iildiiiliriis  ,Ii;ki'I!I.Y>,  I'nic.  Zinll.  .*>«)i-.  Lonilitn.  p.  ."••id,  IsT'.t.  — \'i;i;i:il,l., 

Clifck-list,  i».  M,  \H1\K 
I'lrldi  tjviiiihindiciiH  \'i:i!i!ii.i.,  'i'liins.  ('nini.  Acini.,  \',  p.  ."si,  Issi.'. 
I'viliii  lira iiliuxliiHx  l.oc.MJD,  ('.imp.iniir  (III  I'aiithui,  .Viiniilis  do  I'l  niMisiti    dr 

Lv<>n.  p.  217,  \XW>. 
(  (tiniihiiiiilcH  i/ro  iihinilicii  \'i:i;itii,i,,  'rriiiis.  Conn.  .\('ail.,  \.  ]>]>.  si'.  ;il.  I>ii7. 

Tlu'  .slicll  is  r(nm(l«'<l.  incqniviilvi'd,  very  tliiii.  li\  ulinc.  ncjirly  siiiootli, 
ofti'ii  with  ii  violft  iridescence  wiieii  IVesli.  Tlie  left  valve  i.s  cdvered, 
even  iVoiii  tlie  niKdeus.  with  line  iniero.scopie  caniptoneetes  .seid|itnre.  iu 
the  loiin  of  tliin,  raised,  discr^ent  iil)lets,  more  or  h'ss  ii  reunhii  an<l 
\va\  y,  most  visible  by  transbieeney.  Tlie  h'ft  val\  »•  soun-tinies  lias.  also, 
line  railial  stria-  and  delicate  lines  of  ^lowlh.  The  mar.<iins  ate  lliiii  and 
smooth,  tiiat  (»r  tlie  rij-ht  vahe  turns  up  a  little  ajiainst  the  other,  whicli 
is  larfi'er.  and  Hie  valves  close  \ery  tiyhtly,  so  that  anterior!\  theic  is 
scarcely  any  visible  yape,  even  nt  the  byssal  not<h  or  at  tlie  end  of  ilie 
auricle.  The  byssal  notch  is  well-marked  and  the  pectiiiidial  tcetli  are 
small  and  few.  The  byssiis  is  i)robably  very  slender.  The  auricles  are 
not  obli(|ue  and  are  nearly  equal.  The  hiti}i<'i»late  is  ver,\' thin :  the 
siiij;le  loiiiiitiidinal  lidjie  is  scarcely  visible. 

A  row  of  six  or  seven  ocelli  ean  be  seen  through  the  shell  in  alcolntlic 
speeimens. 

A  f«'W  live  speeimens  were  «lre(l<;ed  by  the  Ignited  States  I'Msii  Com 
mission  at  four  stations, olf  Newlbundland  Hanks,  in  i;>(Mo  L'2I  fallionis, 
between  N.  lat.   il^'    K)',  W.  long'.   17     ;>.")'  ;J(»  ",  and   N.  hit.  II     1(1  ;;(•". 
W.  long.  .V.r  .V)'  4")",  18SI-18.S(;.     It  is  also  known   from   the  Arctie 
Ocean  and  oiY  northern  lOurope. 


il 


H 


«.  'S 


CYCLOPECTEN   NANUS  Verrill  and  Bush. 

(I'liltr  1,.\X.W,  li^s.  L'-l.) 

('jlilnpcil,,!  uiiKHs  \i;nu!i.i.  aiK.  r.rsir.  in  \r,itiai.i  .  Tians.  ( '<inn.  .\im(1..  \.  pj).  s.">. 
Id',  pi.  x\  I.  iif;s.  I-J-r_»c,  lS!t7. 

Shell  small,  the  breadth  and  height  about  i'qual.  the  \alves  nearly 
equal  in  size  and  coiucxity.  Dorsal  hinge-margin  rather  long  ami 
straight;  auricles  r(datively  large  and  broad, both  ends  in  the  left  vahe 
sid)truncated  or  a  little  convex  and  forming  nearly  a  light  angle  with 
th(!  dorsal  margin,  ami  ha\iiig  a  small  incurved  not(di.  well  dilferen 
tiated  from  the  body  of  the  shell.  In  the  right  valve  the  anterior 
auricle  is  narrow,  somewhat   more  elongated,  obtiisel.y  rounded  at  the 


i     \ 


«3S 


ri:i>(i:i  i>/\(is  nr  mi:  \  irf<>\.ii.  ur.v/r.u. 


VI It..  XX. 


ciid,  witli  ;i  sli:n|i,  iiii^iiliir,  liyssiil  iiotrli  1i(>iu':itli  it,  scpai  :itf<l  liuiii  \\n> 
lioily  oT  the  slicll  li\  ii  iKiri  i»\v  ^icuiN  c.  TluMlorsiil  in!ir;;iiis  of  I  In-  hody 
of  tlu'  slifll  ;iit'  iiciirly  striii;:lil  ;iii<l  tonii  iii(»r«'  tliiiii  ;i  liyiit  ;iii;;lt';  llif 
vciiiiiil  iiiiiruiii  is  hnnKlIy  ioiiii(U'(l,  nciiilN  Nt'iiiicii'«iiliir.  lunniii^'  a  vt'iy 
olttiisrly  roiindcd  aii;;I«',  wImmc  it  joins  tlic  dnisal  iiiarj;iiis.  C^niliosa 
littl(>  proMiiiiciit.  witli  a  sniali,  sinnoth,  latlin'  aciitc,  itu-iiiNcd  Weak, 
wliicli  piojccts  a  little  aboNc  I  lie  liiiim'  iiiiii';;iii.  Tlui  rturl'iico  (d' tlu' Icit 
vsilv*'  is  ('\ ciywiivic  t  liiclily  cov crctl  witli  line,  almost  micioscopic,  radia- 
tin;;' si  ria'.  whicli  hrcniiic  a  little  more  distinct  on  tlie  ant»'ii(»i'  auricle; 
sli<;litly  raised  lliin  lines  id"  jurowili  are  »d'len  wvy  <listinct  on  some 
parts  of  tlie  siiell,  especially  on  t  lie  antei  ior  aniiele,  w  here  tliey  become 
i'loser.  inoie  re^nlar,  and  (d'ten  pi'odiie«'.  in  crossinj^'  the  radial  striations, 
a  quite  lei^nlai',  ndei'osco|»ie  decnssjitiou;  thoseulpt  ure  on  t  he  posterior 
auricle  is  sometimes  siiidlar  i»nl  liner,  althonjih  in  nniny  speeinicns  the 
Mirl'ace  is  nearly  smooth  <tr  marked  only  by  very  tine  radial  stria-.  The 
1  ii;lil  valve  is  less  convex  than  tin'  let!  (its  \-entral  edj;(^  does  not  (|ni!(^ 
I'cach  t  lial  of  t  he  opposite^  n  ah  e).  the  und>o  is  less  piom incut,  t  he  beak 
less  acute,  and  scar<'ely  i)roJects  beyoml.  and  olten  tails  short  ol.  *^l,e 
hin;;('-mal'^in  :  the  iuetpiality  is  less  marked  than  in  most  (d'  t  he  allied 
species.  The  bo<ly  of  the  shtdl  in  this  val\u  is  Hinooth,  except  lor  \ery 
fine.  irre};uhir  lines  of  .growth ;  (Ui  the  anterior  auricle  there  are  from 
three  to  six,  or  nutre,  distinct  radial  ridges,  rouj;hcued  by  conspicuous 
lines  of  yi'owth :  the  marjiin  below  the  byssal  uotidi  is  entire,  withoiil 
pectiiiidial  teeth:  the  posteiior  auricde  is  uearl.\'  suu>(>tli.  The  internal 
hin;je  plate  is  thin  in  the  middle,  but  ivlatively  broad  on  each  auricle, 
and  is  crossed  by  numerous  line,  well-marked,  transNcise  striatioii.>. 
these  aie  mucli  moie  consi)icuoiis  than  in  any  (d'  the  ridated  spei  !'s, 
whether  youii}^' oi' old.  The  lesilial  pit  '.■;  small,  rounded,  situated  just 
under  tlM^  beak.  The  inner  surfact^  issmooth  and  j;lossy.  although  in 
fi'csh  s|ieciiiieiis  the  external  •liidiutini:  lines  sin »\v  throu,iih  by  transpar 
ency.     There  are  no  internal  liiie. 

The  ground  I'olor  of  the  ri.<;ht  valve  is  yellowish  or  inrayish  white, 
with  more  (U' less  numerous  lij;ht  yellowish  brown  and  reddish  brown 
spotsor  l>l(»t(du's,  and  soinet  imes  with  irri  uiilar  patches  of  op;i(|ne  white: 
the  ii<;ht  vahe  is  white,  sometimes  with  a  few  ..Xilowish  brown  spots. 
Solium  specimens  are  nearly  destitute  ot"  spots. 

Len-ith  of  one  of  tlu^  larjicst  si)eeiuuMis,  7  mm.:  heijiht.  <>  'miii.:  dor- 
sal hiuiic  iiiaryiii.  I  mm. 

It  has  been  taken  in  consideial)!e  numbers,  ^  ..  dead,  at  three 

stations  between  \.  lat.;??"^  7'  iU",  W.  lonj;-.  7i  iO",an(l  N.      r.-'Jo^ 

•tL',  \V.  Ion-.  71    or  ;}(!",  in  I.",  to  131'  fathoms,  b 

AltluMijuh  very  snnill,  this  species  .seems  to  be  adult,  .i  is  so  distinct 
from  all  ofhei-  species  of  our  coast  that  a  detailed  comparison  isuiuieiv 
e.-ssai'y.  it  resembles  the  yoiiiiL;' of  I',  rliiitint'iis  nu>re  tluiu  any  other 
native  species,  but  a  comparison  of  specimens  of  the  same  si/.e  shows 
nuuketl  (lill'erences. 


I 


K'T 


NIP.  lira. 


in:i:i'-\y\ri:i;  \ini.i.rsi  .i-\  i:i;ini.i.  .i\i>  in  sii. 


s:\\) 


*r 


CYCLOPKCTEN    LKPTALEUS   Vcrrill. 

ll'hllr    I. .WW.   li-.    I.I 

I'lilvH  Irpliiliiin  \  l.iiiiil.l.,  Tunis,  ('(iiiii.  .\(Mil..  \  ,  |i|i.  'S.'t'J,  L'>1,  \SX2-  lOxpl.  lllm- 
IroMn,  l.'«|i(H't  I'.S.  Com.  FInIi  ami  lisln'riiM  I'nr  |nx;i,  p.  Ti'l.  lSS."i.  Iiai.i,, 
I'.iill.  .Mil-.  Comp.  Zoill.,  Ml.  |..  L'L'i,  JSNI. 

I'hi  iiilnniiiHiiim  lijtiiilnit  K.vi.i.,  Hull.  1'.  S.  Nat.  Miih.,  Ni>.  :!7,  p.  ;!|,  IsM'.t. 

(Uiiliilifiliii  li'fttiih  IIS  \i  itiMi.i.,  'I'nin.s.  CiMin.  Acini..  \,  jtp.  s.'>.  Cl',  IS'.iT. 

Mr.    Dull    li;i-^  cxprcKscd   it   (loiiltl    ;is   t<>  lliis  species   bein^   disiincf, 
I'lulii    I'nini  iiilliril'ir    liMVelU  llierelnre    ii   \eiy  miieli    eiii;ii;,fe(l    liLjiiie  ot 

llic  sliejl  is  Ihtc  introduced  lor  coiiipai'isdn. 

ill  iiddJtioii  fo  llie  j)iil>li.^lied  deseriptioii,  it  slioiild  be  stilled  tlnil  the 
eoiiceiidic  IIim's  are  soiiiewliat  tliickeiied  and  elevated,  e\»n  w  lieio 
tliiiiiiesi.  and  tliat  the  headed  eharaeter  is  (ptile  miliUe  aiiytiiini;  I'oiind 
oil  ('.  iiiiliril'n\  or  allied  spetue.s.  Tiie  heads  are  closely  arraii;;('d, 
i'lliptieal  in  loiiii,  and  most  elevated  al  llie  center,  tlu^  elevation  l>ein;^- 
ot'ten  jfreater  than  tlie  <lia  meter ;  the  summit  issiiiootli  a. id  i;lass\ ,  sn  that 
w  lien  vit'wod  from  aliove.  umh'r  a  lens,  they  often  appear  to  lia\-e  a  ecu 
tial  ea\ity.  'i'lie  radial  lines  are  comparatively  Ncry  thin  and  delicate, 
and  not  visihie,  except  wlu'ii  coiisidei  aldy  magnified.  The  heaUs  are 
more  acute  than  in  C  iinlni/'ir,  uud  die  nucleus  smaller  and  smoother. 

Two  live  specimens,  station  lilO'i.  off  Caiie  ilatteras.  North  Carolina, 
in  ML'  fathoms,  iss;j. 


^4 


CYCl.OFECTEN   PUSTULOSUS   Verrill. 

(I'l;ilr   I.W.W  .  li^s.  .-.,  ti,    1(1,    11.) 

J'icliH  iiiiKtiiliiHiiM  \'ii:i<ii,i,.    AiiMM.   .Iiiiiiii.   .Scii'iKc,  \,   p.  II,  |S7:!;    Tiaii.s.  (  unii. 

Aca.l.,  111.  p.  .".II,  1S7I. 
I'lrliti  htisLjiiisi  \ar.  ini.tliilomin  N'laa.'ii.i..  Tiaiis.  Ciinii.  Ai'.ail..  \ ,  )k  .")S1.  pj.  \i.it. 

tiffS.  L'l'.  L'L'd,  IS.sU  I  not  III.  \i.i\,  lit;.  III.      .Nut  I'lilfii  Imshiiiini  ti .  O.  Sai;-. 
I'lcliH  jiiistiihiNiiH  \'i:Kiai.i..  Trans.  Conn,  .\rail..  \  1.  p. '.'nl  i  p.  'is\   in  [iMii ',  lss|; 

I'.vpl.  .llhtilrosK,    1,'i'port    I'.S.  Com.    I'isli   ami    I'isliciifs   loi    Iss;;.  ji,   "..".T    in 

jiail  ),  111.  \\\i.  tijis.  1  iL'ff.  //,  ISK"). 
I'evtiii  imhril'ir   I  )M.i,,  l!iill.  .Miis.  Ciun]).  Zonl.,  X  11,  p.  I'l'O  j  in   pain,  i  mil    pi.  n  , 

tifis.  \<i.  l/'i,  isstl:    Knll.  1.  S.  Nat.    .Mns..   No.   'M,   \>.  :;|  i  in   part),   pi.   i.\i\. 

lil^s.  I  IJ((,  //,  ISSil  (liol    pi.  1\.  liii.s.   I((,   I/),.      Not    I'eihii  iiiihril'cr  l.dNi'.N. 
Cililiijiictiii  (HI  M I II I  on  II  n  \'i:aKil,i,    Tians.   ('<iiiu.  Acad..   X,  jiji.  70,  M!,  !IL'.  pi.    \i\. 

li^s.  :!,  1,  I--..;. 

This  species  lias  heen  refi'  red  to  J'ri'pfidiin.siinn  hoshi/nsi  hy  def- 
freys,  and  to  I'cctcn  {('i/clo/xclcii)  iinhrij'cr  hy  Dall.  It  never  has  the 
internal  ribs,  like  the  former,  wliieli  it  resemliles  in  sculpture,  from 
tli«'  lattei',  as  ori.uiiially  de.scrihed  hy  liO\<'n,  and  redesciihed  and 
lijiured  hy  (I.  ().  Sars,  it:  litfers  esjiecially  in  the  character  of  the  orna- 
meiitiition  of  the  left  viihe.  The  Scandiiia\iaii  form,  accordiim  to 
these  authors,  lias  ilie  vx'sieles  miK-li  less  crowtled  in  each  radial  row 
;iud  siihcoiiical  and  miierouute  in  form;  while  in  ours  they  arc  usually 


HAi) 


ri!(>ri:i:iu\(is  <n'  iiii:  x.irntx.ii.  mi  s/:i  m. 


Vnl..  XX. 


closely  crowded,  nf'ten  cxni  in  coiilju't  in  tlic  liidiiil  n)\vs,  and  in 
foini  citli*-!-  roiintU'd  oi  ellipticiii  witii  tlit*  lon<^'<'st  diaMictcr  in  tlM> 
tlir«'cli(tn  <•!'  (in;  cunccnl  lie  lines,  with  llie  summit  eveidy  lonnded, 
showing  no  tendeney  lo  the  .siilieonieal  or  mneronate  lorm.  \\  hen 
perl'eet  (liey  resemble  small  hlisters  with  the  surlae.o  i'ou;;hened  or 
iiiinutely  ;;rannlose  under  the  miei'oseope:  when  brcdveu  uv  worn  olV,  as 
IVequently  happens,  t  he  liasal  part  remains  in  the  Icuiu  of  a  siMuieireiilar 
oi'  seiniellipt ieal,  ind»rieated,  arehed  scale,  usually  considerably  ele 
vated  abo\e  the  siirl'ace  and  connej-ted  by  very  delicate  concentric 
raised  lines.  The  surface  of  the  anterior  auricle  ol"  the  left  \alveis 
roujihencf!  by  close,  elevated,  (•ollceu^ric  linos,  and  Irom  four  to  six 
well  ma:  ked  radiatiu;^' ridj;es  or  ribs,  ujxm  which  the  concentric  lines 
form  rej^ulai'  ele\  ated  arehed  projections,  (dten  so  crowded  as  to  be 
ind)ricated  :  in  some  youn;.;  examples,  like  the  oim'  li]uiired,  the  coiu'cn 
trie  lines  on  t  he  auricle  are  less  crowded  aiul  only  t  wo  (»r  t  iiree  ol  the 
radial  rilis  arc  (b\eIopctl;  in  such  examples  tluMOsicles  »ui  the  body 
of  the  shell  ate  relatively  jewel'.  Iaij;'er.  more  rouiuled,  and  nunli  less 
crowded  in  the  radial  series.  In  s(tme  spe«imens  I  he  posterior  mar;iin, 
below  the  auricle,  is  nearly  sm(»otli  or  marked  only  by  the  line  lines  of 
g'rowth,  while  in  other-^.  especially  lari^cr  specimens,  this  rej^ioii  is  cov 
ered  by  rather  sharp  iiianules,  .sonu'  of  whi»di.  toward  the  sciitral 
niarjjin.  chan;;c  to  p(»inted  scales  arranj>ed  in  crowded  radial  rows. 
The  raised  concentric  lines  (»n  tne  ri;.;lit  VJilve  are  j;eu»'rally  more  or 
less  appressed  and  sonu'times  induiitaled ;  toward  the  xcntral  margin 
.some  of  them  sli<»w  \ery  tine  juicroscopic  crenulations.  which  are  much 
less  distinct  than  on  ('.  iinhrif'rr.  as  liiiured  by  Sars. 

This  species  is  distinct    from    that    lijiiired    by   Mr.   Dall'   under  the 
iismu'  of  <'.  iiiihrih  I-.     His  specimen  apparently  b«don^s  to  the  follow 
inu  species. 

SoNcral  li\e  and  dead  speeinu'us.  at  eleven  stations  betwi'en  N.  hit. 
11  .tr,  VV.  Ion.;;-.  Mi  11'  lo".  and  N.  hit.  :'.'.»'  4S'  ;',0".  W.  huij;-.  70  o  1  , 
in  1t!».i  to  AIT  fathoms,  isTi'-lSSo. 


I 


CYCLOPECTKN    SUBIMBRIKKR  Verrill  ami  Hush. 

d'l.it.'   i,.\\\\  ,   tiys.  H,  il.  1 
/'<(■/(//   /(OS /,(/;/ .si   \  I'llUMI.I..     Tr.lllS.   (   (III  II.  .\ii|<l.,  \  .  p.  ."(Sl.  |il,  \I,1\  ,  lifT.  i  1,  ISSli.       .\<il 

I'orlics. 
I'irlrii   [  !'■•«  iiilamiiMiiitii^    tmhril'ir   ll.Mi.    Itiill.    Mum.  Coiiip.   '/.oi'A.,   \II.   |i.  L'L'O  liii 

liait  I.  pi.  1\  ,  li^H.  I((,  1*<.  I^SH;    Hull.  r.  S.  \al,  Miih.,  .No.  ;{?,  p.  :tl    i  in    p.ii'l  i,  pi. 

i\,  lij:s.  l-(,  \l>.  ISSJI. 
i'llilitftfcli  u  Kdliiiiihri/if  \  latiui.i,  ;iii<l  llrsii,  in  \'i;uiiii.i..  Timiih.  Conn.  ,\(itcl.,  X, 

pp.  s|.;ii.'.  is;i7. 

Shell  small.  iiie(|uival\  ed.  while  or  .urayish  white,  translucent.  lciii;lli 
and  liciuht  nearly  e<|ual.  horsal  inarj;in  sli'ai^lit.  Aiit«'rior  auricle  in 
the  left  \al\e  rather  larj«e  and  broad,  thocuitor  end  obtusely  rounded, 

Ithllvr  .MmIIii-im,   pi.   |\  ,  li;;N.    Id,    I//. 


NO.  ii::!i. 


Drii'-WM Fi:  Mo/j.rsc.i  ^  i  i:i:i;iii.   t\i>  /;/■>■//. 


S41 


r 


covi'ird  willi  siimll.  I'Idsr,  iiidial  lilis  :iii<i  ri.iwdi'd  coiHTiidii'  riducs; 
IMislnior  Miii'icic  iiiiicli  sin:dl*'i',  w  itii  iVoiii  olio  to  tlirct-  I'liinl.  rndiiil 
ridm's  Mild  m;iii\'  cMiicfiil  ric.  raist'd  lines,  and  willi  its  oultr  cud  ruriii 
inj;  It'ss  tliaii  a  ri<;lit  aii.ulc.  w  itii  ji  .sli<,dil  inciiixcd  iiotcli  hclow .  In 
til*' li.ulit  Nidvc  tin- anterior  auricle  lias  a  similar  radial  sculpliii c  and 
tlie  l)\ssal  notch  is  rather  deep  and  narrow.  Tiie  dorsal  lines  of  the 
Itody  of  the  shell  I'oriii  rather  less  than  a  ri.uht  alible;  the  ventral  iiiai 
^iii  t'oiins  iieail\'  a  semicircle  with  an  olitiisi^  an.i;le  where  if  meets  i  he 
d(»isal  outline.  I  initos  a  little  jnoiii incut  ;  beaks  small,  acute,  smooth, 
and  project  in;;  Ix'vond  the  maruin  of  the  hiii^ic  The  siirfac(^  id"  fin* 
left  \alve  is  coverwl  with  slightly  raised  coiiceiitric  lines,  which  are 
interiiipted  or  hridien  up  Ity  small  arched  scales  wliicii  ai'e  sometimes 
somieirciilar.  l»iit  inoi'e  fre(|iieiitly  somewhat  aiiunlatcd  or  V  shaped, 
and  iisiiall.x  are  separated  by  intervals  about  equal  to  their  l.rea<llli: 
these  scales  \aiy  in  number,  luil  aro  usnalls  arranged  in  about  loity 
radial  rows,  and  increase  i'e.i;ularly  in  si/e  tVom  the  iimlxis.  where  they 
are  replaced  l»y  thin,  sli^ihtly  raised,  radial  lines  (uossin^-  ihc  stronger. 
mole  elevated,  concentric  lines,  but  not  risinj"'  into  point.-.  In  some 
speciuiens  the  radial  arraiiucmeiit  is  scai'cely  discernible;  the  scales 
appear  as  irreoiilaiities  in  the  concentric  lines.  The  postero  (loisal 
area  below  the  auricle  is  nearly  smooth,  e\('e])t  for  the  line  lines  of 
;;iov»tli,  but  sometiiiH'S  shows  minute  ;;raiiules,  'I'he  riuhl  \al\e.  which 
is  smaller  than  the  lett,  is  covered  by  tine,  thin,  close,  concentric, 
raised  lim\s,  which  sometimes  show  microseoide  striations.  The  ante- 
lior  aiirich^  is  decussated  by  from  six  to  <'i,iiht,  or  more,  small  radial 
rid^ics.  which  are  ei'os.sed  by  llu^  raised,  coinciitric  lines:  the  latter  ris(> 
into  sharp  s<'ales  at  the  doisal  n\iir<;iii:  the  small  ]»osteiior  auricle  has 
liner  concentric  lines  and  only  twn  or  three  fjiiiit.  radi  il  iid;;es. 

<'oinparatively  few  specimens,  at  three  stations,  between  N.  hit.  I'J'^ 
I.-.'  ;{»»',  W.  loii;^-.  <'-  I '•',  and  X.  hit.  .!!»  ."■.;!'  .!(»'.  W.  h.ni:.  71  I;;  .;(»", 
in  rJl  to  ol'J  fathoms,  iSTT-ls.S,"). 

('.  1,1  nii(((lir(iisi.s  iSmith),  from  north  (d"  Kerniadee  islands,  in  ti(Kt 
fathoms,  is  a  rehited  speeies. 


PR0IM-:AMUSIUM   THALASSINUM     Oall.   V.riill. 

I  I'l.ii.  lA.x.w  II.  li-.  i;.) 

.liiiiiHHiinii  I'fiivxtnilinii  \' I'.liuii  i.,  I  r.iiis.  (  imii.  .\i';iil,,  \  .  j».  .">SL',  ISM'J. 

.Imiisniiiiii  s|i.  \  I  a!  in  I  I .  Tniiis.  ('(nii.  .\<mi1  .  \  I.  I'li.  J(il,  L'st.  issl. 

I'll  ten  (  /'>('»(/wmi/-M'(/;ii )  tlniliixsiiiiis  l».\i.i..  Mull.  Mie-.  (  (iiii|i.  /in'il..  \ll.  |i."Jl.'t.  iSSi'i; 

Mull.  r.  s.  Nut.  MiiH..  \<..:!7.  i>.:!i.  ishh. 

I'l'Diiriiniiitiinii  llitiliiniiiiiiim   N'i'.liKll.l..   'l'rnii>.   (  (inn.    \i;iii..  \ ,  jiji.  s7,  !'L',  |il.  \i\, 
li-iH.  .'.-7.  ls<t7. 

I'oiind   at  thirteen  stations,  between  N.  hit.  I<>    .'•   .tl)  ,  W  .  Ioiil;.  70 
L';5'  r»U",  and    N.  hit.  .!:.     IL".  W  .  Ion-.  71     :>!'  .lO   ,  in    1.'.  to  .117  fat  hours, 
IHSO-lHSij.     South  {it  Haibaihts,  in  L'L'  to  ;{17  lal horns.-  hall. 


iiH^...ijuja 


sl-J 


i'i;<iii:i:hi\>:s  or  r/u:  .v.c/vo.v.)/,  \rrsi:f  )r. 


vol..  XX. 


l'}iiiiil\   AIM  ID.i:. 


i  ;ath  y  a  h'(  a    K..i,<'it, 


7'///)^. —  lUtthjitircii  inctKiiciiloiili s  1  SciHclii  . 

SIm'II  oiildii.u.  siiIm>\  iili.  (ir  Kiiiiiiicil.  r;itlur  1  liiii.  usually  liiitiy  rjiii 
(•('II.iUmI.  willi  liiiirv  <ii'  scaly  »'pi<iei  mis,  more  or  less  I'quilatcral.  Im- 
<|iM'iiti\'  sli^litl>  iiin|iiival\  I'fl,  witli  a  slij^ht  l)yssa]  sinus.  Uyssus  \fiy 
sriiall.  Li«:aiii»'iiial  area  lauci'uiatc,  Ioiil;*'!'  ansi  naciMw ci'  hcliind  the 
Itfaks.  witli  a  sa^iiltatc  jtostcrior  li^aiucnl.  I  i  iii^«' luarj^'iii  Mcail\ 
straii-lil.  usiiall\-  narrow  ami  (mUmiIuIous  in  tiic  niidtllc,  willi  a  scries 
oi'sniall.  ol>Ii(|Ui'.  stiialcd  and  cicnulatrd  icctii  <in  cacli  end,  (lu'  disial 
onis  liccondiiu  lar.m'r  and  iiioic  oiiliijuc;  I  liosc  of  tiie  postoiior  sciics 
usiuilly  litni^ci'  and  more  oldiijuc.  or  divcrffcut.  tiian  those  in  liif 
antcricM-. 

'I'lic  aniin.d  of  /.'.  jn  it  inu-iilo'nh  s  \ai'.  i/rtiinlis,  lU'csciA  t'd  in  alroliol.  lias 
l'>«'  niaiuin  of  tnc  inanllr  plain  uitliout  ocelli,  with  a  well-devcloped 
niiisrnlar  septum.  posleiiorl\  :  tiie  loot  lai'ji'c  and  thick,  {i'cnicidatc. 
]M)intcd  postciioily.  witii  a  strong"  hyssal  uroox  c  and  a  slender,  solid, 
hyssal  stem:  t wo  ]»aii's  <»r  rather  siiudl,  loii.ii",  lanceolate  palpi;  the  rec 
turn  with  a  tree  terminal  portion:  (wo  pairs  of  ratlmr  larji'c  jiills,  with 
the  po>tcri(ii'  end  of  the  stem  free  lor  some  distance,  cui'\ed,  and 
t;iperctl  to  a  point,  ami  with  the  rellecte(l  p(»rtiou  oi'tiie  lilamcnt  oltlie 
sam«'  lenjith  as  the  direct;  (he  lilaineiits  are  vvvy  sleinler.  delicate,  ami 
soft  and  hiil  sl:uhtl.\' at  (ached  (o  each  other. 

This  division,  which  is  jtroliahly  of  >;eneric  \alue.  includes  a  numhci- 
oC  small  and  mostly  deep  water  species  whltdi  ha\e  been  vai'iously 
plai'iMl  hy  recent  autliois.  Mr.  !•].  A.  Smith  puts  several  »d"  them  in 
Sctij>li(ir(ii  with  a  mark  ol<louhi.  Mi'.  Dall  ]uits  two  allied  s|)ecies  in 
(he  Jurassic  <^cnus  .l/(fr>of/r;//,'  with  which  (hey  do  not  seem  to  amree 
veiy  closely,  ami  miMitioiis  (he  airnii(y  of  others  to  linrlxifia. 

'i'he  last  uidiip  dili'crs  in  the  stout,  rouj;h  sliell,  strongly  .inai)iu.u'  ven 
(rally  for  (he  hu jic  byssus.  and  in  (he  chaiairter  of  the  te«'(h  and  li;;;! 
ment.     Scdjiliiinti  has    a   thick,  st  I'oiiyly  ribbed,  incipiivalvcd  shell,  a 
linn    byssus.  and  con(iuu(Mis.  strong,  laiice(date  liunment.     Mdrroilmi 
has.  on  (he  postciior  hin^cpiate  lonji',  di\erj;ent  lamelhe.  nearly  paral 
lei  with  (he  dorsal  margin. 

We   would   refer   the  followinj;'   species  to   l'n(tlij/(ir<n. — /.'.  imlumii 

'fill'  t  \N  <>  W'l'st  Tiiili.'iii  s|»('ri(s  ilt'scrilird  iiy  Mr.  Dail  iis  Mairodmi  aniicrnhi  ami 
.1/.  sdiiriniiiit,  slioiiltl.  |it'ili;i|»s,  loiin  ,i  scparati'  yi  mis,  cliai  a<(rri/r(l  li\  tin'  low  \i  i\ 
(>lilii|iii'.  Niililaiiii  ll.ir,  |iiisti'ri<ii-  tc(  lli  ami  MVcral  sinailri ,  inailx  1 1  aiis\  ithc  anldi'ir 
uiit's.      It  may  In- <l('sij,fii:i(t'(l   as  III  i:lh<it  ca,  witli  Hi  iitlunrn  iisjiiriihi  a- tlic  t\  ]n'. 

1  lii'^c  arc  fliiM'l  \  ri'Iatfil  in  om' ol"  t  Ih'  Moccim  lossil  s]t{u\fs  (I  ri<i  ml  n  rsuli  n  in  liiK 
wliicli  I  •i>iia\  c  s  |ilai  1(1  ill  Ills  ^;i  iiii|i  id'  •■  ('nriillairt'rt,  '  liiit  lain  w'lilcrs  ( Cimr  I'i 
isi'i'.l,  l-'isrlifi,  ami  «i|lii-rs  i  liavr  taktii  lii^  iii>t  spticit's  (Intiiodoiitn  i  oT  tiial  >;riiii|i  a> 
(lie  t\iii'  I'f  tlic  j:;ciiiiH  "Citiiilliniii."  wliich  (litl'ciH  in  liaviiij;  llic  aiitfrinr  ;>s  wi  II  as 
IIh'  |his|ci  ill!  tfilli  lotij;  and  lamt'llitorni ;  licinc  wo  wmiUl  assot  iato  TtTtiaiy  siiecicM 
liko  JlcnlliaiLa  inlivniiilviilala  with  tlio  iivin;;  th-ep  wiitcr  Ioiiuh. 


1 


> 


N"  li:«'-  hEl.r-WM'I'i!    MOI  l.!'>i(.\~]El:i;ll  I.     I  A  7>  /./  n//. 


S43 


hiitirs  I  Sciifclii )  ;iii(l  its  \iiii('t  its.  (//vu/'//.s  \'fi  rill.  I'n  ilt  i  Ji'Wvoys.  si  pt<  ii 
hioilillls    S;||'S.  rrnnlhltil     X'cllill.  niliifllldlil    1);|11.   tlnin    oil"   Si.    N'illcfllt. 

iKiitliWiiid.      /•'.  ///"'■/V(//.v  (( ii'ii\),  Arctic  Aiiiciicit  ;iii(l  I'luiopc.      I:.  Kim 
iinilii  \  I'll  ill  and  liiisli,  ( iiill"  <»!'  Maiiu'.      H,  (ihi/ssoniin  N'cnill  and  IJiisli. 
<»IV  I  )rla\vai('  i>ay.     /».  jminiinHrithi  N'cnill.  fVnni  oil'  West  Indies,  north 
ward.     I:.  iiliiiiiriiilK  (Dall),  li.  poli/riinni    I>all  .    /.'.  c/^/' /;rr/(«/.s"  (Sinitln, 
oil'  West  Indies,    />'.  iniiijuist  itlptu  ;Smitlii.  /.',  /ihrinssn  !  Sniitli  i,  .\tla  nt  ic 
and  racilic.    />'. //////^f/^/ i  Sniitli ).  I'aeilie. 

Ill  iilliiircti  ii.siK  riilin\y,\U  ,  :\ii*\  />'.  saiirhnita     halli.are  iVuni  the  West 
Indies,  in  deej)  walei'. 

BATHYARCA  ABYSSORUIVI.  new  species. 
.  I'hil.'  I,\\\  1.  liu,  !t. 

Shell  small,  short,  well  ronnded  at  both  ends,  swollen.  ine(|iiilateral. 
sliuht  ly  (il»ln|ne.  with  a  rather  lonu,  straight  iiinu'' margin.  liidMis 
lai'.uc,  sw(dlen.  prominent,  ileaks  prominent  and  eiirvcil  >tronuly  for- 
ward, situated  considerably  in  front  of  the  middle.  Surface  e\ cr^ 
wliero  eo\  ei'cd  with  nearly  eipial.  delical*',  raise(l.  radiatin,n'  lines  and 
small,  rather  <'\'en.  raised  lines  (d'  ;.:ro\\  t  h  :  these  together  piodnce  a 
linel\  canceilated  ^nrtaee  which,  when  fresh,  is  co\ered  with  a  thin 
Inownish  yellow  epidermis  Idrmiii^'  small  scalediki'  points  at  the  intor- 
sectioii  (»f  till'  lines;  the  surface  is  also  marked  with  sli^ilil.  irrei^nlar, 
coiH-eiitrie  '..aves  or  iiiidiiiations. 

The  anterior  margin  is  shorter  than  the  posterior  and  torms  an 
obtuse,  rounded  an.ule  at  its  jniK-tion  with  the  hini^c  margin;  ilie  \eii 
tral  niarj4"in  is  oi)liiiuely  <mrved.  most  prominent  behind  iheniMldle. 
where  the  curve  forms  neaily  the  se«;iuenl  <d' a  circle:  posterior  marjiiii 
is  \ery  broadly  roiiinled  and  tbriiis  a  distinct  obtuse  aiiji'le  where  it 
joins  the  dorsal  ie.ar.t;iii.  The  lij:ainental  area  is  laneeolaie.  mod- 
erately lar^c.  decidedly  w  idei'  iiist  in  front  of  the  beaks.  becondiiL;  nar 
row  and  pointed  posteriorly.  Tiie  dark  lif^ameidal  i)atch  is  .urow 
shaped,  sit  naled  l»ehiiid  the  beaks.  The  hiii^-e  mar.!;in  is  rather  wide 
and  stronji'.  with  a  small,  central  edentulous  space,  mostl.\  beiiind  the 
beaks.  The  teeth.  whi(di  are  striated  on  the  sides  and  crtMiiilaled  on 
the  ed.ne,  are  eipially  and  decidedly  nblii pie  in  the  two  series;  the  juox- 
iiuiil  iuies  are  small  and  the  others  increase  in  si/.e  and  obliipiiiy  to 
near  the  end  of  the  seiit's.  where  one  or  two  of  the  oiilermost  are 
d«'eidcdly  smaller  and  \ery  ol»li(|ue.  In  the  larjiest  specimen  thert;  are 
about  si\  teeth  in  t  he  anterior  and  ei;:lit  in  the  p(»st«Mi(U'  series.  The 
inner  siirtaee  shows  faint  r.uiial  ;inM)\<'s  and  ridj,M's,  tiiuch  coar>er  than 
the  external  stiia;  there  is  also  a  line,  imprt-ssetl  line,  with  a  linely 
creniilattMl  edi;e  close  to  the  niar;;iii. 

Leii^ith  of  the  laifiest  specimen.  <»  mm.:  heiuhi.  <I.."»  nun.:  thickness, 
A..')  mm.;  leiiutli  of  (he  hinL:e  margin,  '>•""•  mm. 

Three  specimens  were  fuuml  at  statiiUis  L*71.".  and  JTl  I.  oil    Delaware 
JJay,  ill  l,rtJ.")  to  l,.s")!t  fathoms,  isso. 


EaKSFaHJ.l-iii!ft'lS"PP'''^^''Wi 


sll 


I'nociriuM.s  OF  Till:  xatiosm.  Mrsi:r.y. 


Vdl,    \\ 


'rilis  spfcit's  is  allicil  to  /.'.  iilmiiirnhi  l);il!.  'I'lic  !iit tcr  (lillei's  in  li;i\ 
iiiii  :i  less  niiindfd  101111  willi  :i  loiijicr  liiiiinc  iii;ir}^iii,  inoic  (li-liiiiic 
tt'i'iiiiiiiil  iuiulfs.  :iii(i  iiiiii-li  more  luitMcroiis  iiiid  siiiiiDct'  teeth  wliicli  arc 
nearly  cunt  iniioiis.  In  our  spcciniens  of  />'.  ijUnnmiln  of  concspondiini' 
si/e,  tluMc  arc  altoiit  ten  Icctliin  cacli  sci'ics  and  tlicy  aical)()ut  one  lialf 
as  lar,ii('.  Accord inj;-  to  Mr.  DalTs  lij;nres,  Mie  uud)os  oflds  species  arc 
lai'jje!' tiian  in  tlic  more  nortlitrn  lorni.  Imt  our  specimens  ot' Ids  species 
have  tlic  iirnhos  smaller  tlian  is  in<licatcd  by  his  lij>nr  ..  The  position 
ol'  the  l)caUs  and  lorin  of  the  liuanicntal  area  is  nearly  the  same  in  both 
species;  bnt  the  hitter  ap])eais  to  be  a  little  wider  in  ours  and  the 
ln'aks  are  a  trillc  moi'c  obliipie.  The  external  sculpture  is  similar  bnt 
the  ladial  lines  arc  decid«'dly  sti'onfiei'  and  less  numerous  \u  f/hnncniln. 
and  the  si'ulpturc  is  (piitc  ditVer«Mit  iu  the  two  vah'cs.  while  in  ours 
there  is  no  perc<'ptible  dilVci<Mice.  />'.  inivijuisculpUt  (Snuth)  is  also  a 
closely  allied  species  which  Mr.  l>all  considers  identii-al  with  ll.  ijlomr- 
nih(.  Mr.  Smith's  liiiurcs  arc  »piite  dill'erent  from  tiiose  <d'  Mr.  Dall. 
and  also  from  our  West  Indian  specimens  of  the  latter,  and  still  more 
dillei'cnt  from  /.'.  <iliiiss<ni(iti. 

BATHYARCA   PROFUNDICOLA   (  Verrill). 

1  I'Imi.'  i.\.\\  ii:.  li-.  •_'. ) 

.lr(<i    iirttl'iindiciihi   \  I'liKl  I.I  ,     I'lMlis.    ('oiiii.    AiMil.,  \I,    |i.    \'.\'.K    jii.    M.IV,    lii^H.  LM. 

L':!(/.  iss.">.  -  l>.\i  I .  liiiil.  Mii>.  Cniiii..  /i),;!..  Ml.  |,.  L'l:.,  is8(!. 
Mtiiiodoii  iinti'iiniliiol((   I>ai.i.,  liiill.  I,',  s,  Nat.  Miis.,  No.  :>?,  ii.  IJ.  pi.  \i.\  1.  li;,'H.  L';i, 
■S.ia.  iss'l. 

A  very  few  specimens,  at  three  stations,  ]>et\veeii  N.  ii't.  MP  L'O',  \V. 
Ion;;.  <i»i  I,  and  N.lat.'.T  .  W  .  lon.u.  71  ."il.  in  l,7<tiMo  L'.D'JO  fathoms, 
ISSI  and  ISS."i,  ,\lso  anumu  l-'orandnifera,  station  L'.'Wa,  N.  hit.  L'S  51', 
VV.  loni:-.  SS  •  is  .  in  V.'io  fathoms. 


BATHYARCA   ANOMALA,  new  species. 

ll'llll.'    I.\\\   II.    li^r.   S.) 

Sliell  snuill.  obhui^',  ineipiilatt'ral.  much  swollen  with  larjce  ])rominpnt 
umbos,  and  jioinlcil  beaks,  curvt  tl  strongly  foiward  and  cousiderahly 
si'parated,  owiny  to  the  unusually  wide,  lanceolate,  li^ameidal  area, 
which  is  covered  behind  the  Ix'akswith  the  renuiins  of  a.  daik  thick 
cned  liyanient.  Dorsal  nmr.uin  straight  tor  nearly  its  entire  length; 
anteri(U-  and  posterior  ends  broadly  and  about  e(pially  rounded,  the 
posterior  a  little  the  im»re  swollen  behnv  and  loiiucr;  ventral  mai'^in 
broadly  idunded.  a  little  prondnent  in  the  ndddlc.  with  a  sliiiht  byssal 
indentation  in  front.  Surface  everywhere  covchmI  with  line,  re;;idar, 
raised,  radiatin,n  lines  which  are  chMMissated  by  liner  lines  of  growth; 
the  rathei'  thin  In  own  epid«'rmis  is  scaly  or  chaiVy  on  the  radii,  espe 
eially  toward  the  nmriiius,  w  Iumc  it  forms  nniiiile  points.  Ilin,i;e  niai'yin 
considerably  thickened,  increasing  iu  stren^'th  toward  the  ends;  in  the 


my- 


NO,  llilit. 


i)i:i:r-\\\i  i:i;  moi.i.i  s<  .i- 1  i:i:i;i/.i.   i.v/;  iiisii. 


s4: 


middle,  wlicii'  it  is  niirrnwcst,  if  is  iiciiily  sm(M)tli  :iiid  ntiiiidcd.  with 
only  sli^iiit  iii<li('iiti(»iis  dl'  (»in'  or  two  tiansvcrsc  tcctii  on  cacli  side; 
next  tlicse  tlit'ic  arc  two  oi'  tliire  soiiK-wliat  ol>li!|iic,  slii;ii(|y  divci'^cnt. 
iire;,'ular,  loiifiitiidiiial,  slij^litly  striated  and  crcniilated  folds,  sciiaraicii 
distally  by  ratln-r  drcii  urooxcs  m-arly  |»aiall«d  wiiii  the  inner  niai^in. 
'riie  iimer  edjie  of  tlie  ventral  niar.uin  is  tldn  and  plain. 

Kenj^tli,  S..")  iiini.;  Iieijilit,  7  nun.;  tliiekness.  <•  mm. 

( )iie  li\in<;' specimen  i  No.  7  lOSl  i  was  dredged  l»y  tlic  IIikIh  \\\  siation 
")2.  olf  Caslies  I-ed.ue.  in  27  fathoms.  !S7I. 

As  oidy  a  single  specimen  has  been  Ibnnd,  it  is  possildc  tiiat  it  is  bnt 
an  al)noriiial  variety,  jiltlinn<jli  it  appears  to  lia\t'  been  healthy  and 
well  j;rown  in  every  respect.  It  is  related  to  /.'  iHcliincnloiids  ,V\;\\{.\ 
lA.W  II.  lif,'.  <•),  but  dilfeis  remarkaidy  in  the  character  of  the  hin^^c, 
which  has  the  transNcrsc  !«M'th  scarcely  disccrnibh'.  and  oi»li(|ue.  incu 
uia»'  folds  on  the  distal  parts  of  tiic  marj^in.  and  also  in  the  greater 
width  ol'  the  liyaniental  ar«'a. 


1 


Family  Id  .M(  )rsil).i:, 

LIIVIOPSIS  SULCATA,   new  species, 
il'l.ilcs  XCll.  liu.  L':  XCWii-.  !•:  \(  V  I.  il-.  1.  i 

Shell  \(My  (»bli(|nc  youiin  specimens  aic  less  ohli(|ne  and  in  some 
cases  ai'c  more  neaily  circnlari.  broad  ovate,  the  po>i('i  ioi'  ventral  niar- 
juili  liinch  prodnc'd  and  obtusely  rounded;  auricles  oidy  slightly  <lc\cl 
(>p»'d.  The  dorsal  mai'jiiin  is  short  and  slrai^lit.  with  a  narrow .  siimm»i  h 
area  beneath  the  beaks;  the  anterior  margin  is  suhtmncate,  or  very 
obtusely  rounded:  the  ventral  margin  is  oblique.  l>roadIy  rounded, 
foi'ininji' an  obtusely  rounded  anylc  with  the  posterior  niaiyin,  whicli  is 
stronji'ly  sloping  and  oid.\  a  little  c(»n\('\.  'i'lie  umbos  arc  small  and 
somewhat  prominent;  the  b(>aks  small,  pointed,  and  curved  inward. 
The  entire  surface  is  coxcrcil  with  strongly  nuirked,  concentric  i^iooncs 
and  i»r(iUHnent  rouudt'd.  naridw  ribs;  the  lattei'  are  crct-sed  by  numer 
ous  line,  radiatiui;.  incised  striations,  which  divide  llieni  into  beadlike, 
or  stpmrish,  portions,  which  are  most  obvious  on  the  middle  ami  pos 
terior  parts  and  become  very  faint  antcrioilv.  The  liinuf  niaruin  is 
much  thickened  and  bears  a  curved  series  of  rather  laryc,  llaitened 
teeth,  (»f  which  about  eijilit  are  situated  in  Inmt  of  the  beaks  and  ahout 
ten  behind  them;  those  neaicst  the  center  are  small;  theresilial  pit 
extends  upward  to  the  ln'ak  in  the  tbini  (tl  a  small  lrian,^ular  deitrcssion. 
The  inner  surface  of  the  shell  is  marked  by  fine,  ladiatinj;  stria;  the 
margin  is  thickened  and  <'ul  avv;iy  near  the  cdjic;  no  crenulations  iiave 
lu'cn  observed  in  oui'  specimens. 

( Ireatest  leuiitli.  Umm.;  jireatest  height.  I'!  mm.:  breadth.  (1  mm. 

A  nund»er  <»f  separate  valves,  at  about  ten  stations,  beiween  N.  lat. 
40  S',  \\.  lon}>-.  (IS  ir>',  Kud  N.  lat.  ;;7''  7'  1",  W.  Ion-.  71  .".r)'  10",  in 
(M  to3H>  nulioms,  1S80-1SS1. 


h; 


I 


KlO  {•uncEEUJXns  OF  Till:  XATfOXiL  VISEIM.  v<.i,.xx. 

LIMOPSIS   MINUTA  (Philippi). 

Cl'liifrs   I.XW.  li-.  1;    l.XWIll,  li^'.  7.) 

I.imoiisis  nihinia  \kijKIIi.  riiins.  Conn.  Acad..  V,  p.  r>7li,  \X'<'2;  \\.  \i.  L'Sd.  l.ssi ; 
\:\])\.  .Ilhiitnt'in.  lu]>nrl  r.  S.  Com.  r-'ish  anil  KiHlicrirH  for  isss,  ]i.  .")77.  IMM."..-- 
Smuii.  I'.,  a..  Ikoport  NDy.  ('ItttUinijir.  /oi")l.  I.aniclliliriinrliiiita.  \  I II.  p.  lTiS, 
isx,-,.._|>,vi,i,.  r.nll.  Mm-.  Comii.  Zo.ll.,  MI,  \).  '2'M\,  IWtl;  liiill.  C.S.  Nat.  .Mn>.. 
\...  ;!7.  p.  IL'.  ISS(i.  l!i  sii.  I'.iill.  Mus.Cninji.  ZoCil.,  .\  \  II  I.  p.  '-M."',  pi.  I,  li^'.  M. 
l,S!i:i.  —  I,ii(Alti>.  ( ':inipa!iMi'  (111  <'itii(l(iii,  .Viinali's  ilc  ITnh  fi'sitc  dc  I,\on.  p. 
Mt^.  IMM'i. 

A  vt'i\  (•(•iiminii  :iii(l  iibimdiiiit  .^jx'cios.  at  ciyiity  two  stations,  hctwcon 
N.  lat.  J  J  7'  ;5(l'  ,  \V.  loiiy.  :.7  Hi  l."i",  and  N.  lal.  .T.  tlt'.Ut".  W.  Ion-. 
7!  ;{l'  ir»",  in  IK!  to  L'.-iM  latlionis,  1880-1SS7.  South  to  lluibados.  in 
.")(>  to  L',L'1.M  t'atlionis.— Dali. 

LIMOPSIS  AKFINIS  Verrill. 
(I'la:r  I.XW  .  liu.  L'.  1 
I  iiiKijisis  <iijiiii'<  Vi;i!i;ir,i,.  Trail-;.  <  Dull.  AiM(l..  \l,p.  II'.'.  lss.5. 
'I'wo  live  sin'cinit'us.  al  station  L'd'.L'.  N.  lat.  .Mt    r>.S'  ;{")".  W.  Inn-.  71 
:{(>".  in  l'.t7  latlionis.  JSS.;. 

LIMOPSIS  PLANA  Verrill. 

(I'lalr  I.XX\',  lit;.  .".. ) 

/.(m«/;>(.s  Hp.  I  .'i  N'latiai  I.,  'I'r.nis.  Conn.  .\ia(l..  \  .  p.  l.'><0,  ISSl. 

LiiiKijisis   ///(()(r7  VKiaai.i.,    Trans.  (  unii.  .\ca(l..  \  I.  p.    111.   ISSL':   I'.xpl.  .illiiilniKs. 

I>'i  port  r.S.  ( 'oni.  I'isli  ami  I'islicrics  for  l,ss;!,  p.  ,".77.  iss."*. 
l.iiiiii/i.^iH  (uirilii,  Viir.  iiliiiiit  1 1  Ml  .  I!mII.  1.  S.  Nat.  Mils  ,  No,  ;;7.  p.  11.'.  ISS!'. 
liiiioi'^ix  phnni    i'.l   SII,  jiiill.  Mils.  (   oliip.  /oiil,,  XXI  II.  pIl.L'lll.  ■_'ll.  pi.  II.  Ii-.s.  I!l.  I'd, 

is!i:;. 

'riirt'c  ii\e  spcciiiM'iis  and  one  \al\(',  al  two  ,->talioiis.  iK'twccn  N.  lal. 
;5S  I'L' .  \V.  l()n,u.  70  I7';50'\and  N.  lat.M  10' .'.o  .  W  .  loii,u-.  7ti  :u  :w\ 
in  1,.S'_'."(  loL!,-l-l  latlionis,  ISS.'I-ISSII.  Suiitli  to  1  Joiiiinita.  NN'i'st  Indies, 
in  l.l;;i  to  L'.L'iM  latlionis.— Dall. 

'I'lic  largest  spiM-inicn.  iVoni  station  2710,  is  IS.o  mm.  lonj::  IS..")  mm. 
jiioli:  liin.uc  niafoin.  II  mm.  Ion,"-:  1  ij^a mental  area,  .'i  mm.  lono-. 

LIMOPSIS  AUKIIA   >  Brocch*  i  Jeffreys. 

(I'lat<'  I.XXN  .  li-i.  :;.  1 

.'    Inn  iiiiritit  I'.Kot  .  Ill,  Coiirh.  loss.  Siil)ap..  II.  p.  IS,".,  pi.  \i.  lij;.  !•  (  t.  .I«  Ifrcvs). 
/,//i(.;/(.vi,s  aiirilii  .Ir.i  i  i:i:v-.  nritisli  Cnmli,.  1 1,  p.  Hll.  pi,  n  .  liu.  :>.  I''^t'l  :   N  .  pi.  n\n. 

111,'.  I,  Isiiil. — SMiiii,  I".,  .v..  h'l'jiorf   Voy.  r/((;//(  »r/(i ,  /oiil.,  l.ainrlliln  anclii.i  I  i. 

.\lll,p.L'.")7.  ls,s.-,.  -Dam..  Hull.  .Mns.  Comi.. /ool..  XII,  j).  L':^.  issil;   Unii.  1.  s, 

Nat.    MllH..   No,   ;;7,    ]!.  I-',   ISS!).  —  I.ocAltn.  CaMiice^nr   ilii    C(n((/<(M.  .\iiiiali  -  ili 

i'lnivrrsilc  dc  Lyon,  p.  1!)7.  Isim;. 
Not  l.iiiioi>siH  iiiirilii.  vaiii'ty,  N'l.iaaii  .  'Ti.in.s.  Conn.  ,\i'.i(l.,  \  1,  p.  1  Id,  is.s.".. 

One  valve,  ainoiio  |m»i  aniinil'era.  station  :.';>sr).  N.  lal.  -JS  ."il',  W.  lonji. 
SS    IS',  in  7.".0  latlioms.      Soulli  to  (iienada,  in  L'l  to  l,r>Sli  latlionis.— 

Dall. 


Ni).  ii;;ii. 


in:i:r-\\.\  n.i!  Moi.i.rsa—i  i:l'i;u.l  .isn  in  si/. 


Si: 


The  II  irlluM'ii  s|H»cim('iis  (//,  pro/iinilicolii)  i\)vu\rv]y  rrt'ciifii  doiiht- 
I'lllly  tu  lliis  species  pi-ove  to  he  distinct.  Tlie  siii^^le  s|icciiiieii  imw 
included  ii;;rees  well  with  a  s[)eciiiieii  (•!'  the  lussil  Inriii  liom  lliiiope. 

LIMOPSIS    PROI'"UNblCOI.A,  new  species. 

^  I'lairs   l,\\\  ,  li-.    I;   l.XWIll,  li;;.   I.) 

I  iiiiDjixis  (dirilii,  \.iriit\   (  .' I  \'i;ui;i  I  1  .   Tr.iii'-.  ('onii.  Acml.    \  1,  |i.  I  Id,  \hKk 

('(nnpiii)iti\el\  tew  >|ieciiiieiis,  iit  ten  stations,  liet  ween  N.lal.  il  7', 
AV.  luni;.  <;■.  L'(i  ;5U".iind  N.  lat.  M  17'.  W.  hni,-;-.  7;J  !>'  30  ',  in  1  .:.L'.".  in 
1,8.V.)  I'athoins,  ISSl-ISSO. 

Fainiiv   MVTlMD.i:. 

CRKNKI.LA    l''RAGII.IS  Venill. 

i'lalr   J.XWIii,  lius.    I.J.I 

<'rniillii  I'raiiilix  X'KiUtii.r  ,  I  r;iM>.  (  Oiin.  A>  ,iil.,  \'  I.  p.  III.  |ss:,._|  t  mi,,  r.iijj.  | '.  s. 
N;it.  Mils..  No.  :!7.  p.   in,   |ss<i. 

One  vahe  and  a  lVa.i;iiieiit.  slatiini  L'L't;,").  N.  lat.  .'m  7'  Kt'  ,  \\  .  li>ii<;-. 
71     ;>.")'  1(( ',  in  70  lathoiiis,  l.SSl. 

(ll.O.MID.i:.   new    lainily. 

(.Idiii'uiii   \  rijiai  I,  .iikI  I'.rsii.  Aimi .  .lourn.  Sci..  1 1 1 ,  |i|i.  ."iH,  ,"ili,  .l.inn.ii  \  .   IM'T. 

Siieil  shnit,  roundish  a  I  hoi  h  end>.  1 1  intje  plate  w  ii  h  a  low  nl'  i  rans- 
veise  leelli  each  side  of  tiie  niiudh-.  I,ii;aiiieiit  tliick,  elonualed, 
altaciied  for  most  of  its  h-n^ith  lo  tiie  inner  snrl'ace  oi  ilie  posteiior 
hinuepiale  and  riinninii'  forward  in  a  narrow  j^rooxe  oeiieath  the 
heaUs,  so  I  hat  its  anterior  port  ion  is  external  and  its  liiickened  pos 
teiior  port  ion  is  partly  internal.     No  pallial  .•^iiiiis.     Aniinal  not  known. 

Th.s  liroiip  includes,  so  far  as  known,  only  tlie  ;4'enns  (ilnnnis  .\r\' 
freys.  w  liich  has  heeii  referred  by  sexcral  writers  to  tin'  Arcide.  and  l»y 
others  to  tiie  I. edida-,  tVinii  both  of  which  it  differs  widely,  lis  rela- 
tions to  tiie  Xuenlida'  are  s(»inewhat  uncertain,  owinu  to  our  i.'^iioraiice 
ol'  the  solt  parts,  in  tlu;  form  and  position  of  the  lij;ament  il  ililVers 
entirely  from  all  other  jienera  cd"  Nnciilida-  and  Lediila'. 

,\  more  niatnre  consideration  <»f  tiiis  uroiip.  since  the  publication  of 
our  loriner  article,  lead.s  us  to  consider  it  as  a  family  di>liiici  from 
Nnciilida'. 

GLOMUS  JollVpys. 

f.7<(mH.v.li:Ki  l,■I■■,^    ,  .\mials  Miiy.  N.il.  Hist.,  |>.  i:t:i.  .N'ovcmlH'r,  tsTf..  -  \i  i;Rii.i.  Mini 
I'li-n.  Aiiifi'.  ,1(111111.  Sci..  III.  ]>p. .").!.  5;t,  ,hinii!iry,  \X'M. 

T}i}u . — (llnnnis  nihus  .It'tfrey.s. 

Shell  thin,  smooth.  sulK'ipiilateial.  rounded  at  both  emis.  willi  (he 
beaks  turned  forward.  No  liinnle  or  esciitciieon.  lliii;^e  witli  two 
seiiesof  oblitjiiely  transverse  teeth  ;  a  small  lateral  toot  ii  may  Ite  present. 


six 


i'i:ini:i:n{\<.s  or  /'///   vi/vovi/.  }nsri}r. 


vol..  XX. 


Til*'  Inildw  illy  ;iic  (lescrilitMl  spocics: 

(I.  nihns  .Icllrrys,   North   AHiuitic  (l'!ni'<>i)«M  iind    IVom  oil'  Marlliiis 
\iiM'y;ir<i   soiiili   to  oil"  Ifio  <h' la   I'lata  ( .Kim'iica);   d.  Jijlrri/Ni  Smith; 
(i.xinijtii.r  Smith,  anil  (i .  'nuiijuiUtli  ralis  Smith,  West   Indies;  (i.  j((poH 
iciiN  Smith,  oil'  'lapaii. 

GLOMUS  NITENS  Jeffreys. 


i.lii 


Zoo  I. 


1  I'liilr  \(\!l,  liu>.  1,1.'.> 

nihii.i  .lia'ii!i;\  >.  Annals  Miii;.  Nal.  Hist.,  p.   {;!:{,  Nnxcnilirr,  IsTti;    i'mc 

.Inni,  1S7!>.  —  \KUltit.i.  Tiaiis.  Conn 


I.iiikIdii.  |i.  5711  pi.  \  IS.  li 


.\iail..  \  I,  ji.-;!!.  IS.^I;   llxpl.  .Ilbtilrosx.  licpnit,  f.S.d'oin.  I'isli  and  I'ishcriis 
for  ISS;!,  p.  .">7t!.  IHK").— Smith,  K.  .\.,  liN'pnrt  NO.v.  ('hiilhniio-.  /on!..  I.anicjii- 


III  anr 


liata.  Mil,  p. IMS.  1 


SN.-).  — i»Ai.i,,  I  •.nil.  f.S.  Na).  .Mns..No.  :;7.p.  U\,  IHSit.— 
\'i;i!i!ii.i   anil  Hi  sii.  Aiiioi.  .loniii.  Sci.,  III.  ]i.  .Mi,  li;;s.  1.  L'.  .Jannaiy,  lsit7. 

The  siu'cinn'ii.s  which  wo  icl't'i'  to  this  species  ajirce  closely  in  size  ami 
I'oini  with  .Iert'i'eys''s  I i;^!! res.  1  nit  thcr«' is  in  botli  \al\('sa  small  siii)mar 
^inal  lateral  tooth  just  heyond  the  posterior  series  of  teeth,  and  in  the 
ri.nlit  \al\ea  similar  but  less  prominent  one  Just  beyond  theanleiior 
s»'ries.  These  are  not  mentioni'd  in  .TelTreys's  description.  In  thepo.s- 
terior  series  there  are  fewer  te«'th  than  in  his  li,i;ure  an«l  they  have  an 
acute,  oiiliipie,  V  shajx'd  outline  and  are  but  little  raised:  in  the  ante- 
rior series  there  are  four  lai'o'er,  obli<|ue  teeth  wiiich  are  not  so  dis 
tinctly  V  siiape<l,  owinj^'  to  their  obli(pie  position  and  l»ecause  the  sur- 
face of  the  hinjic  i»late  is  turned  downward.  The  i)()sterior  lijiament  is 
stronj;'.  lonji".  wedii'e-shaped,  widest  distally  where  it  o(!eupies  most  of 
the  width  of  the  hiuju'e  plate;  the  narrow  prolonjiarion  runs  forward 
under  the  beaks  in  a  narrow  "i'roove.  There  is  a  thickened.  »'dentul(»ua 
space  under  the  beaks,  separiitinj;"  the  two  series  of  teeth,  wliich  has, 
when  highly  ma};nilied,a  very  small,  anf^ular  notch  in  the  middle  of  its 
lower  eilo'e.  which  in  our  specinu'ii  is  tilled  with  what  appears  like  the 
remains  of  a  ri'silium;  there  is  also  a  very  minute,  Vshajted  notch  in 
the  external  margin.  The  beaks  turn  forward.  The  pallial  impres- 
sion is  rather  indistinct,  but  aj)pears  entire.  Interior  somewhat  lus- 
trous, but  not  at  all  nacreous. 

Two  imperfect  s])ecimens,  at  two  stations,  otf  Marthas  V^ineyard  and 
oir  Delaware  Ibiy,  in  l.r»l  I  and  l,r»(KS  tathoms,  l.SS.'i  and  1S.S(!.  South  to 
b'io  de  la  IMata,  in  :2J)i  to  1,000  fathoms.— Dall  and  Smith. 

I.M'.VIKW  OF    llli;  (iKXKli'A  ol'   IJlDiD.i;  AND  Nl('i:i,II).i:  ol"  TIIKATLAN 
IK"  COAST  OF  TIIK  IINTTHD  STATICS.' 

Tlu'se  famines  are  often  united  by  modern  malacoloyists  umlei'  a  sin- 
gle family  (XueulidaM,  while  others  regard  them  as  distinct.  They  are 
certainly  clo.sely  related  aimtomieally,  as  well  as  by  the  structure  of  tho 
shell      Thus  all  the  uuunbers  (►f  both  families  have  a  single  pair  of 

•  An  .ilisiiactiit'tlio  portion  of  thia  artido  n^latiii;--  to  thfsc  I'aiiiilirH  w.is  piiUlisiicd 
ill  llii-  Aiiifricaii  .loiuiial  of  Science,  III,  p.  '"'li  Jaiiiiaij 


l»!t7. 


Ni>.  ii:i'.). 


l>i:i:i'  ir.i  III:  Mni.i  i  sr.i—i  i:ni:ii  i.  .(.\7»  /.tn//. 


Silt 


1(1 
|(i 


silllplc  '•  loliuhliUK'liiilU^""  (or  l>lnlnl»i;ilirlii;ih')  ^JIIn;  Iwo  |i;iiis  tt\'  l;iij;t' 
liibiiU  piil|»i,  tlic  oiiUt  (UH'S  fiuiiislii'd  with  loiiif  cxloiisilr  I;ihi;il  tciilii- 
cles;  a  liir^r  imisriilar  loot  with  an  cxpaiidrd.  coiitMNr.  hi  iniiiiil  disk, 
adapted  tor  rapid  riiotioiis  in  iiiii)piM<;'  and  swianiiini:.  as  \vt-ll  as  lui' 
ciccpiiij;';  and  all  liavc  two  scries  of  traiisv«'rsi'  or  uldii|ii('  Ici'th  on 
the  liin^ic  mar^iiii.  'riic  peculiar  structiiics  ot"  lo(»t  and  <;ills  appenr 
lojfetlier  t'lsewliere  oidy  in  the  landly  Soleniyida'.  wliicli  is  e\id«'iitl,\  a 
lelated  jiroiip,  tlioiifili  it  lacks  liinjjeteei  li  and  has  a  \  t'r,\- ditlcrent  shell. 
As  tiiese  three  families  Inivc  j^ills  of  a  peeuliaf  and  siniidc  stincture, 
eaeh  one  consistin;;'  of  two  rows  of  Ihit  ianielhc,  ;it  Inched  to  a  single 
stem,  they  lia\t'  recently  Itecn  regarded  as  torminj;  ;i  specini  (Miicr 
(  Protohranchiatai. 

This  yronp  is  of  special  interest  because  of  ils  ;;reat  iintii|Uily. 
liUrj^c  numbers  ol'  fossil  forms  very  closely  allied  to  cxistin^i'  ;;en<  ra 
and  species  occur  even  in  Silurian  and  Devoidan  Ibrimitions. 

Thus  the  common  living'  <;enera  Xuciihi  and  Liihi  ar(^  repicsented  by 
numerous  !)e\(»niaii  s])ecies,  many  of  which  can  not  be  sepmated  from 
the  recent  tbrms,  even  as  subgenera,  by  any  t;in;iil»le  characters.  ( )t  her 
species  <»f  the  same  age.  referred  to  Pahroit)  ihi,  a<;rcc  in  nearly  all  css<'n- 
tial  eliaraeters  with  the  liviiiu'  ^cnns  Tindarui.  'i'hese  fossil  shells  are 
{jeiHTally  lar<;er  and  stron^ei'  than  the  correspond  in  ji"  livinj^'  species. 
Many  Paheo/oic  m'uera  which  aie  now  extinct  were  as  hiuhly  orL;aiii/cd 
ami  as  nuudi  speciali/.ed  as  their  livinj''  allies. 

The  thin  shelled,  strongly  siphonate  jj,-ein'ra.  such  as  )i>l(li(i.  Ynidi 
ilhi,  etc.,  do  mtt  appear  so  early  in  ^eoloyici*'  time  ami  may  be  reuardcti 
as  more  modern  specializations  of  the  beda  like  forms.  They  are  al>o 
the  forms  that  swim  and  Jump  with  the  ;^rt'atest  activity.  Theiclbre 
the  thin  and  li^ht  charaetei-  of  their  shells  may  l>e  regarded  as  ha\in.<i' 
been  secondarily  ac»|uired.  partly  in  conseciiu'nce  ot'  theii'  active  moxc- 
ments,  in  whieh  a  heavy  shell  would  be  disadvantai^cous.  and  i»aitly 
because  the  development  of  lonii'  siphons  enables  them  to  li\  <•  concealed 
much  of  the  tinu'  beneath  the  surface  of  the  soft  mud  in  which  they 
generally  live.  In  Solciin/ii  the  slndl  is  still  lighter  and  thinner,  in 
aecordance  with  more  develoju'd  swimminj"'  habits.  <'ond»ined  with  biii'- 
rowing  when  at  rest.  Such  forms  as  Xncuhi  and  '/'iiuldrld.  w  hich  liav(! 
no  siphon  tubes,  must  live  at  or  neai'  the  surface  of  the  mud.  o\  er  which 
they  ereep  with  their  larye  expanded  pedal  disk.  These  have,  for  thcii' 
protectiiMi,  comparati\eIy  solid  shells  similar  to  those  of  Paheo/.tiic  spe- 
ci*'s.  in  form,  texture,  ami  sculpture. 

The  fanuly  Nuculida'  dilVcrs  tVom  L«'dida'  mainly  in  having  no  siphon 
tubes,  the  nnintle  edges  being  coinjdetely  disunited.  'I'he  Ledida-  are 
remarkable  for  the  great  variations  in  the  strnetui'e  of  the  hinge-teeth, 
ligament,  cartilage,  and  mantle,  as  well  as  in  the  form  of  the  shell. 
The  pallial  sinus  may  be  wanting  or  well  develo|ied.  Some  genera 
have  long  united  siphons  (  Yitlditi);  some  have  shorter  ones,  nioic  oi' less 
sei)arate(l  (  Lcdo);  while  in  iiitdnriti  there  is  no  true  siphon,  but  only  aii 
i*roc.  N.  ^1.  vol.  XX oi 


8r)0 


fi:nri:rnry<is  or  riir.  \.\rio\M.  .]frsi:r)!. 


vol,.  XX. 


cIIj'IciiI  oiilici'  dillVmitiatcd.  'i'lir  li;;;iiiiriit  iii;i\  In-  wliolly  cxtniiijl, 
as  ill  Mdlhllii.  TiiiiliiriK,  rtc,  or  it  niiiy  1»«'  nidiriuMitaiy  and  irplactMl 
hy  an  inlcriial  cart  ilauc  or  "  rcsilimn."  ni-  Ixitli  may  coexist  in  vaiNJnj,' 
devices  ur(lc\clo)»nicnt  and  d(';;('ncration,  'I'lic  liin^c  tcctli  may  l>c  very 
numerous  ami  leunlaily  V  sha|>ed  in  each  series,  or  tlicy  may  I»e  com- 
paratively few  and  iirejiular.  sometimes  becoming;  ol)Ii(|ne  and  lamelli- 
form  {SilifKla).  'I'lie  beaks  yeneiaily  tnni  baekwanl  i  Vnhlia,  Lviln^ 
\i(ci(lt().  but  in  Mdlhtlfi,  'iixtlitt'in.  and  some  otlier  ;;eiieia  tliey  turn 
forward.  (Mi  this  ac(!onnt,  when  theic  is  neithei'  pallial  sinus  noi' 
external  Ii;;ament,  it  is  often  dilliciilt.  if  not  impossilijc.  to  tell  which  is 
the  anterior  end  of  the  shell  without  the  soft  parts.  Hence  nnmy  fos- 
sil and  some  recent  species  have  i»rol)aidy  been  reverx'd  in  the  descrip 
tions.  Thus  many  of  the  fala-o/oic  specit's  referred  to  \ inula  are 
<lescribed  as  ha\in;,'  the  beaks  turned  forward,  the  Inuj^er  end  of  th(^ 
shell  I;,  inj;'  cmisidei'ed  ]>()sterior,  Itnt  in  niodiMii  Xxiiiln  the  beaks  turn 
backward  an<l  the  shorter  end  is  posteiior.  .Many  of  the  deep  sea 
species  with  small,  thin  shells  show  no  distinct  muscular  nor  pallial 
sears,  which  increa.ses  this  dilliculty.  When  a  .litlerentiate*!  «'.\teinal 
lij;ament  is  piesent,  we  have  assumed  that  it  is  posterior  to  the  heaks 
(opisthodelic).  tliou{j;h  a  narrow  extension  usually  runs  under  and  for- 
ward of  the  beaks  in  a  j^roove.  When  the  shell  of  a  diinyarian  bivalve 
ji'apes  posteriorly,  the  existence  of  a  siphon  may  ^enei-ally  be  assumed; 
for  otherwise  the  internal  soft  parts  would  beexposetl  to  enemies.  The 
existence  of  a  posterior  I'ostrnm  or  a  protrusion  of  the  posterior  nuirj;in 
deliiM'd  by  an  inferior  eniai'<:inati<m  indicates  the  existence  of  a  siphon, 
or  at  least  an  anal  tid)e.  Imt  these  organs  may  exist  without  such  mod 
ilications  of  the  shell.  If  these  lules  be  applied  to  I'alaozoic  forms  we 
must  conclude  that  the  rostrate  and  snbrostrate  tbrms  of  I'uhvonviUi, 
etc.,  had  some  sort  of  a  siphon,  and.  therefore  were  not  true  NiU'ulida'. 

Numerous  l*aheo/oic  species  refei'red  to  the  ji'enus  P(il(ti>ncUo  proba- 
bly belonj^' to  or  m>ar  the  Tindarina'.  Some  (d' the  species'  fiom  the 
American  Devonian  rocks  can  hardly  be  distinguished  from  Ti)uliiri<i 
by  any  important  structural  characters,  unless  it  be  the  form  of  the 
teeth.  It  is  prol)abIe  that  \iicnlihs  and  scNcral  related  iicnera  Ixdon^ 
near  this  division,  for  they  have  an  external  li>:aiiient  and  no  resilium. 
Tn  these  ;.;-eiiera  the  plain,  transverse  teeth  are  very  numerous  and 
more  simple  than  in  the  modern  genera,  seldom  showing  any  trai-e  ot 
the  acute,  V-shaped  form  chara<'teristi<'  of  most  inodern  ,uen.era,  though 
in  some  spc'cies  thc^  teeth  are  slightly  aiigulated  in  the  middle. 

3Ir.  Dall  has  projiosed  the  family  Ctenodontida'  to  include  ntuuerous 
Paheozoic  sjieeies  belonging  to  Clrnndoula,  nud  allied  genera,  some  of 
which  /iltel  and  others  refer  to  Arci<la'  on  account  of  their  thiidvened 
|)ectunculoid  shells.     They  seem  to  be  allied  rather  to  Tindarina'. 

'  For  r\aiii]>lc  SCO  /'.  coiii^tricla  TImII,  I',  iilana  Hull  in   I'liLioiiloloMy  of  New  York. 

V,  IM.  1.  i)i». :(;!;{.  i;;!!,  jii.  xi.vni,  li-s.  i-i's,  issr>. 

- 'rniiiH.  \Vay;iU'r  Free  bi.st.,  Ill,  p.  "il.").  181)5 


NO.  1130. 


DFHi'  ir.i ri:ii  yrni.usrA-^  vfurii.t.  ixn  insTr. 


fiSl 


Tli<»  lAMli«lii',a.s  here  iiiMh'rstood,  wt-ir  <li\  idcd  into  live  snhriuiiilics  hy 
I'Msclier,  iiiinu'ly: 

(1)  Ciinillclliii;!'  =  rt«'iio<loiiti<l;i'  Dull  -f  I'olanntllo  .\\\t\  Curillnhin'o ; 
(Ll)  Siircptiiiii' (fur  *SVnv7*/a  only);  (.'I)  I.edinM-;  (li  Mallctiiiii- (iiichnliii;; 
Timl(irlii);  {it)  Lyrodcsniiitimr  ((or  iincu'nt  fo.s.sil  lornis  likt^  Lj/nnh.sma^ 
but  iiu'lndiii;;  tlie  liviri};' <;«Min.H  I'liascohis  or  Silii-nht).  An  additional 
tjronp  was  toniicd  for  8()nH'i  otlicr  doiihtfnl  fossil  jyenora.  Tin*  second 
of  these  {fionps  is  not  well  fonnded,  loi-  Sarrjitti  a;;rees  rictscly  with 
Vohlidy  excejtt  in  tin'  allej^cd  ahsrncc  of  a  pallia)  sinus,  luit  its  ;;aj»injj 
shell  indicates  a  siphon  tiilte.  The  fourth  should  not  includi'  Tiiuhtriti, 
whicii  lacks  the  pallial  sinus  and  siphon  tubes  chara<'teristic  of  the 
rest  of  the  y;roup  an<l  slunild  lie  taken  as  the  type  of  a  new  Hubtaniily. 
The  fifth  should  not  incdnde  I'luisfoliis,  which  dilfers  widely  from  the 
fossil  forms  and  b(d<»n;;s  in  the  l.edina-.  The  otliei*  ^icneia  of  this 
j-roup  aie  referred  to  Tri^ioniad  by  other  authors,  and  tliat  would 
seem  to  be  ii  more  coire<*t  arrangement. 

Kandly  NlJCUid  I)  K. 

NUCULINA   d'Orl)i(|iiy,  1H45. 

ririirndon  S.  Wooi>,  1810. 

S'liriililUl  !•'<  McitHiW  ,  isl5. 

Xiirinilla  S.  Wudi..  ISIS. 

.\iiriiH)ia  N'r.It'ili.l.  Jiiid  I'.CSM.  Aim  r.  .loiiiii.  .Sc  i..  Ill,  )))>. .".:!.  ,"i!t,  .l.imiiiry,  IH'.tT. 

We  have  included  Xki-iiHiik  in  the  Xiu-nlida'  with  sonic  doubt, 
because  authors  dilfcr  as  to  its  structure.  Some  state  that  its  lijja- 
inciit  is  wholly  external  and  others  to  tln'  contrary.  l'"is(dicr  places  it 
in  the  Arcida-,  neai'  Liinojists,  but  it  has  no  lij;amental  area. 

Mr.  Dall  kindly  foi-wardcd  tons  excellent  nnpuMishcd  ll;,Mires  of  two 
American  sjiecies  <d*  this  {»enus.  In  these  the  thickened  li<,'ament  is 
external  to  the  hijijje  ]»late,  on  the  end  of  the  shell  which  is  destitute 
of  a  lateral  tooth,  and  is  the  shorter  (jiosterior ?).  The  beaks  turn 
toward  this  eml.  Mr.  Dal'  states  that  the  shells  are  not  distiiu-tly 
nacreous  witliin. 

The  Ibllowinji"  are  some  of  the  known  species: 

X.  niiliiiris  Deshayes;  .V.  onilis  S.  Wood:  .V,  cahihra  Se^^in'n/.a, 
fossil;  A',  mnnitti  Carpentei-,  trom  the  Catalin  Islands;  .V.  snlvnta  A. 
Adams,  from  Korean  Straits;  .V.  admnsi  \h\\\,  from  I'lorida  and  the 
West  Indies. 

NUCUI^A.    Lnmnrx'k,   1790. 

NikhUi  liAMAUCK,    I'roillnliic  (fllllO  N(lll\.   i  1.  do  ('oi|llillrs.    |i.  S7,   \i>.  Idl,  \~W. 

yiiriiliiiiti    iii.Nh,   licsrlir.    It'iist.  .Siiiiiiiil.,   j>.  l.Vi,    1S07  (_iii»(;  of  Adams,  ISTiS,  nor  of 

HiUTlH,  18117). 
XnciiIaDxiA.,  Mull.  Mim.  Coini..  '^*»'"'l-.  -^">  V-  2I'»,  l><Hti. 

Type. — Xitcula  niiclciiH  Lanmrck. 

Nn<'itl(iiia  (Link)  was  an  exact  synonym  uv  variant  of  \nciila,  of 
earlier  date,  as  the  descrii>tion  plainly  shows.     There  was,  therefore, 


H'>2 


vin)Cf:F.hi\us  ttr  riii:  \  irios  \i   mi  wv  u. 


Vim..  \.\ 


ii(»  \  iiliti  cxruse  I'mi' a|»|»lviii;;   it   to  :i  tlillfn-nt   ;:roii|i  ( /,(■(/<»,  tli;i  I    liail 
aliradv  n'lj'ivfd  a  valid  iiaiiu',  as  was  dniii-  Ity  II.  and  .\.  Adams. 

Tliat  u  s|n'cirs  licluiiuiii^  to  Lain  was  niriitionrd  hy  Link  dors  not 
altn'  fli»'  ca.st',  lor  all  tlif  sprcii's  «»('  l.nlii  and  YnhliK  tlirii  known  wcic 
ifl'nicd  to  \i(<iihi  1»\   I.annirck  and  all  otlicr  (•(intliolo;;ist v. 

NIJCULA   HROXIMA  Say,  variety  OVATA,  nuw. 
(I'lal.M  I.WM,  li;r.  i;;   I. WW  111,  \\,^.  :,.) 

\\  <^  dcsiniiatr  Ity  this  nauH'  a  sin;;it'  s|»»'('ini«'n  wliicii  (lillcrs  so  widely 
in  loiin  tVoni  fin- uidiiiaiy  type  ol  S'limhi  pni.iiiiid  that  il  could  well 
1m' tidu'ii  loi' a  distinct  s|H'<'ics  if  it  had  ocruircd  in  lai^c  iniinlM'is  or 
in  a  remote  loc:iliry.  It  is  hroad-ovate  or  elliptical  in  I'orni  and  miieli 
loss  an^ndar  and  oblique  than  the  typical  init.riiim.  It  is  decidedly 
compressed  with  the  umbos  much  less  prominent  than  usual,  'i'iie 
surface  is  flossy,  ^rayiidi  white,  marked  with  <iistinct  lines  of  growth 
and  nii(;roscoi)ie,  radiatiiij;  stria-.  The  aiiteri(^r  end  is  evenly  rounded 
and  more  produc<'d  than  in  jH-oxiiiui :  the  ventral  maijiin  is  broadly 
and  evenly  rounded;  the  post«'rior  end  is  obtuse,  sli}jfhtly  produced  and 
scarcely  anuuhited ;  the  postero  dorsal  luarjiin  is  eon\«'X  and  slopes 
much  less  rapidly  than  in  /inu  iniK.  so  tlmt  the  posterior  end  is  iikiic 
evenly  rounded  and  bioader.  Internally  the  mariiiii  is  i)laiii.  The 
hinge  teeth  are  nmeli  as  in  i>n>.i  i)ni(.]m{  the  two  series  are  le^s  curved 
and  meet  in  ii  broad  aii<;le. 

Tien^ith,  .(.."i  mm.;  heij^'ht,  .'>  mm. 

OiM^  live  specimen  (No.  7.">l()7).  station  Sfl.J,  in  Vineyard  Sdund.  oil' 
Cuttvhunk.  in  is  fathoms,  ISSO. 


NUCUI.A   SUBOVATA.  new  species. 

il'liil.s  I.XX.M,  liu.  S;   l.WXIII.  Ii-.  -y.) 

Shell  small,  broadovate,  with  soinewhar  i»rominent  umbos,  and 
rathei-  acute,  somewhat  prominent  beaks  behind  the  middle.  Surlace 
smooth  and  lustJoua,  covereil  with  rather  re,ui!lar,  concentric,  lines  of 
jiiowth,  which  are  scarcely  visibb*  to  the  naked  vyo.  i']piderinis  thin, 
pale  ytdlowish  ^^reen.  The  antero-<lorsal  mar.uin  is  nearly  s'iaij;ht  at 
first;  then,  forinin,ii'  a  convex  curve,  slopes  gradually  to  the  bluntly 
rounded  anterior  end  wliicdi  is  somewhat  jjioduced  but  not  anyulafed; 
the  postero-dorsal  niar^iiii  is  convex.  slopin<>  rapidly,  and  tbrmsa  slight 
rouiuled  an;,'ulation  in  the  middle  of  tin;  posterior  end,  wheic  it  joins 
the  broadly  rounded,  ventral  marj^in.  Hiii<,'einar.i;in  rather  broad  and 
strtMij;  in  |»roportion  to  the  size  of  the  shell,  with  a  moderately  lai.i:e 
rouiuled,  slij^htly  obliijue  chondrophore  piojectin^"  considerably  wiiliin 
the  margin.  The  portion  of  the  hinge-i)late  behind  the  beaks  is  cmi 
siderably  shorter  than  that  in  front  and  bears  about  six,  slronu. 
V  shapeil  teeth  of  which  the  two  distal  ones  and  the  two  proximal  ones 
are  much  smaller  than  the  others;  i'l  froui:  of  the  beaks  it  is  broad  and 


f 


NO.  ii:m. 


i>i:i:r\y  \ri:u  unrii  sr  i—\j:i:i;ii.i.   i\i>  /;/>//. 


S53 


f 


striiiijuly  (ihn  nl.  iiiid  Ixais  alxtiit  iiiiir  l»i(tii<l.  cli'Viilcd,  struiiy;,  trims 
wvsv  tct'tli  of  wliitli  li\c  (»r  six  in  tlir  inidtllr  ;iii'  iinit'li  Iai;i«'r  tliiin  IIm* 
Otlu'is;  iihovc  flu'sc  tlM'iilltci'  Iiili;;*'  liiiir;;ili  is  sollirwliiit  rxpiimlrd  aiiil 
ov(>iii>(I.  'IMiri'c  is  ii  tliin.  r<)iitiiiii<in>  li^^iiiiifiit  hotli  iM't'oir  aiid  lirliiiitl 
llif  Im'mKs.  I';|»i(h'rmis  iliiii.  imlc  ;irt'»'iiisli  yellow.  Tlie  iiirici  xciitnil 
iii:ii';;iii  is  tliiii  and  phiiii. 

l-t'M<itli,  !.!>  mill.;   Ii('i;;lit,  .'5.1>  iiiiii. 

Some  (d' tin' siiiallcr  spcciiiiciis  have  a  iiarrown' and  less  tliickciMMl, 
liiiij;*'  plalc  witli  (lie  Icclli  iiiort' di'licatc  than  in  tlic  type. 

I'oiir  spcciiiiciis,  at  loiii' stations.  iK'twccn  N.  lat.  I<>  ,  W.  Idii-.  71  ' 
II'  ;{(>",  and  N.  lat.  .IT  H',  W.  loii;>.  71'  ;{;{',  in  i:>7  t..  Ill  latliums, 
ISSl-lssr,. 

This  species  has  Some  reseinldaneo  to  .V.  tenuis.  ])\\t  it  is  iiiii<>h  less 
oiditpie  and  inoitM-loii^ated  in  toriii,  and  is  less  inciiiiilateral,  the  pos- 
ti'iiur  end  not  heiiii;  siildnineated.  wliile  llie  anti'iinr  end  is  narrower, 
relati\('ly  shoit«M'.  and  nineli  less  oldi(|iu'.  'riie  hinjje  iiiarj;iii  is  also 
ditl'eieiit ;  tlu'  teeth  are  fewer  and  inneh  stronger,  and  the  iiini;c  mar^iin 
mneh  broader,  w  hile  the  eliondrophore  is  smaller,  more  rounded,  miieli 
less  ol)Ii([iu'.  and  projects  freely  trom  the  inner  liin;^-e  maryiii  instead  of 
bein;;"  iiiiit»'<l  closely  to  it. 

it  also  ])ears  s(»in«'  resemblance  in  form  to  Xiiciilti  pi  riiiinihini  asis 
Smith,'  Itiit  there  are  marked  ditVerences  in  the  hiiip' and  number  nf 
t«'.etii. 

NUCUl.A   GRANULOSA  Verrill. 
(  I'ImI.-h  1,.\\\I.  W'^.  L';    i.XX.W  III.  Ii,u.  X.) 


Xiiiiilii  ijrauuhiHii  \i;i;iaii,.  I  i  ;nis.  Conii.  Aiiid..  \  1.  p.i'sii,  Issi;  l'.\|il.  \  IIm  truss, 
ii'rpoit  I'.S.  Com.  I'isli  .'iiiil  i'isln  rits  lor  lss;{,  ji.TiTii.  |ssr>.  I>.\i.i.,  Hull.  I  .  S. 
Nut.  .Mii,-<..  No.  :!7.  ]•.  IL'.  ISS!'. 

'I'akeii  at  about  sixteen  statifMis.  between  N.  hit.  II  .■>;>',  W.  lon<;".  Cut'^ 
;'>;■")'.  and  N.  lal.  ."{s  :W  ;?".  W.  lon^-.  T.T  (I',  in  .'Jsl  to  I, (Mil  fathoms, 
lvS.S(l-18.S(!. 

NUCULA  VERRILLII   Dall. 
riiile  \('\',  11-.  10.1 

.V»(r((/rr  Iriijinui  \'Ki;iai,i,. 'I  imii.s.  (  onn.  .\c,i(l..  \'I,ji.  i;!s.  iss.-i  iiint  iiinmi.  islli.uot 

Sc^iicii/a,  IST"). 
Siiciilii    iirrillii    i>Al.l.   iSiill.  Mils.  (iiiii|..  Zoi'il..  .\||.  ]>.  L'lS,  l.ssti;    I'.ull.  C.S.  N:il. 

Mils..  No.  :!?.  p.  12.  ISSII;    i'loc  .  I'.  S.  N:il.  Mils..  .Ml.]..  L'.'.T,  |.l.  \I\.  liM.  1.  IKSJI.— 

in  sH.  i'.iiii.  Mils.  Cnini).  /.(Hii..  Will.  i.|.. 'Jio.  L'l;:,  ]<].  i.  ti^i.t;.  isi*:!. 

('<niiparativ(  ly  few  specimens,  at  six  stations,  b«'t ween  N.  lat.  ;>'.•  I.'i' 
4:.",  \V.  lollf,^  7»»  7',  and  N.  lat.;{i;  -17',  VV.  Ion;.;-.  7;{  !»'  .JO",  in  I.I  10  to 
l,S2r»  fathoms,  l.S8l-l8S«i.  South  to  Yucatan,  in  l.'iO  to  IjdSo  fathoms.— 
Dall. 


'  l»(;iioit    \  (i\ .    <  lidlh/ii/ir,    Zoiij.    liiiiiii-llihriini'liiutii,   .Mil,  i>.  2'J~.  i>\.   win,    lij;.s. 
10-lOa,  1885. 


854 


rnocFEDixr.s  or  rur  XATin\.\r.  MusEr.yr. 


vol..  XX 


NUCULA   CANCELI-ATA  Jeffreys. 
lI'liitiN  l,.\\\I,  liir.  ;{;    l..\.\\\  I,  (ij;.  5.) 

XnniUi  III  niellala  \K.i!iili,i.,  I'raiiM.  Coim.  .\<u(l..  VI,  pii.  L':il,  L'MO.  IHSt ;   lApl.  .(//.// 
troHH.  KN'poit    r.  S.  Coin.  Fir>li  iiiid  Fisheriis  for  IXKt.  p.nTt'..  \xk:,.-^  Dam,,  Hull. 
r.S.  Nat.  Mils.,  No. ;i7,  ji.  \'J.  isx'.i;  I'ror.  I'.S.  Nal.  .Miis..  X 1 1,  ji.  _',".«,  IH8!i. 

A  vt'iy  iibiiiHliint   siM'cit's,  iit  t'orty-four  .stiitions,  between  N.  hit.  IL' 
47',  VV.  ioiit;.  ()lo4',  :iiul  N.  lat.  ;{7^  27',  W.  l(»ii^.  7;{    .'.;{',  in  ;{.SI  t()L',().;;5 
t'iitlionis,  1.S,S;>-1SS7.    H«)utli  toolTToha^o,  West  Indies,  in  .S,S()  t'atlionis. — 
Dull. 

Family  I.KIHD.K.' 

sui.i.uuii.v   1  -i-'.i  )i  Nr.i<:. 
LEDA    SclumiJiclK'f,    1.S17. 

I.ahi  Vkuuii.1.  and  in  sii,  Aimr.  .lonni.  Sci,,  III,  |i|i.  51.  liL',  .lannarv,  IXit". 
yiiriilanii  IIahui.s,  Cat.  Hritisli  Musuiim.  p.  ;tlH.  I«!t7  (not  l.inU,  1X(I7). 

'l)n>«'- — />r'/'»  r<>.strat<(  (Montiijijti,  IS(IS). 

This  j-eniis  litis  lieeii  viiriotisly  extended  tind  icstrictetl  by  anthojs. 
and  sevprjil  snb<,'enerie  tind  sectional  or()iip.s  hasc  been  pioposed.  In 
the  nioie  e.vtended  sense  it  is  .setireely  ciip.ible  of  a  delinition  that  will 
tlistinjjfiiish  it  from   Yohlia,  etc. 

VN'e  j>roin)si'd,  therefore,  to  festrict  it  to  the  typieal  Hpecies,  stnh  as 
L.  citspidatii  (ioiild,  L.niiuldtd  (Donovan),  //.  pmndd  (.Miiller),  I..  Inm 
isiihuita  (Coiithoiiy).  tintl  mtmy  otliei's«'lo.sely  felated.  These  littve  ji  loiij;, 
ti'i>tv<'d,  biciiriiiiite  lostrnm,  and  well  developed  siphon  tiilx's,  partitilly 
Muited.  The  pidpal  tenliicles  tire  loii}^,  tlat,  t;ii)ei'ed,  :ind  tiiise  exteiiiiil 
to  the  bases  of  the  outer  ptilpi,  which  arc  brotid  with  slenth'r,  actite. 
l)osterior  tips. 

Mr.  Ilaiiis  (Hiot«^s  rostrnta  liimnens  jis  the  type  of  his  \iici(l<ni((,  but 
no  such  species  oeeiiis  nntil  (iinelin's  edilicm,  171MI;  rustratd  ('hem 
nit/,  ITS  I,  nsed  by  tSchiiiniichcf  tis  the  type  of  l.nlti,  is  now  considered 
the  same  i\n  fluriatilis  Sowerby  tind  tdso  Schru'ter,  1 77'.>;  ro.s7/v(/.; 
liiiniinck,  1S19,  is  the  stime  as  ftvruiila  .Miiller,  1771  or  (>?,  so  thiit  in 
uain};  roxtraia  Montaj,Mt,  ISOS,  \\{\  avoid  confusion  til"  names  wilhoni 
leading  to  any  misiindeistandino  of  t!ii^  form  of  the  slnill.  for  till  of  the 
jibove  species  have  the  .same  rostrtited  form. 


LEDA   BUSHIANA  Verrill. 

(I'lat.s  l..\.\l.\,  li-.  S;    l..\.\XIl,  liK.  }).) 

I.eda  hiiHhiann  Vi'.ituii  i,,  Iraii.s.  Conn,  .\.a<l,,  \  I,  ]>\>.  2L'!». '_>H(),  1K«| ;  V.\\>\.  .I/'"/ 
IroMK,  Ktiport  IJ.  S.  Com.  Kisli  aini  Fislu'iirM  for  IHHW,  ji.  ,".7ti.  i^W^»,— Dai.i  ,  I'.nll 
IT.  S.  Nat.  MnH..  No.  :t7,  p.   Jl,  \HH\K 

A  few  specimens,  oll'Citpe  llatteras,  North  ('tirolina,  in  HIO  futhoms. 
18tS3.     South  to  Kloritla  St i tilts,  in  IL'O  to  ."»!<)  fathoms.— Dtill. 

'  Alien /(un(/ri  Harris,  Austialiaii  T«i.  .Moll.,  Cat.  ItiitiHh  ftbisoiiiii,  p.  lUW,  IK'T. 


NO.  UM. 


i)r:i:i'  w.i  rri;  mdilvsca^vkuhui.   i\i>  ursii. 


<^1 ). 


.') 


fi' 


LEDA   PERNULA  ^Mulleri. 

(I'l.ltr   I.WMI.   l\;i.  2.) 

I.iild  juruiiUi  (i.  <).  Svl!>,    Molluscii   \U-<i..   Aniir.i    N'mv  iMri.c.  p.  .'i.'i,  ]il.  .".,  ii^s.  1 

II    il,   \>TiX.-    .\\:\\\IV.\S,    I'lOr.    /.(i<;l.    Site.  I.ihmIi'Ii,    |i.    fiTI.   .1 ■,   ISTl'.      \  kk- 

Kll.l.,  I'lnr.  I'.S.  N.it.  Mils.,  III.  )..    101,  ISHl;    Trims,  (.iim.  .\.  mI..  \.  y.'ul, 

IS.Sl';    II,, I    VI,   p.L'Nd.  pi.   \\\,   li-s.    II,    11(1,   ISHI.  — Ndt    1».\II,.    Kllil.    r.   >.   N;it. 

Mils.,  No   :{7,  III.  \i.\.  Iij:>.  II,  11(1,  INX'.i. 

I'miiid  :if  a  riuiiil»«'r<»rstati(»ii.s  lK'!t\v«'«'ii  N.lnt.  Ki    'l.\\  \\  .  loim.  ."iL*     !."»', 
anil  N.  hit. .17    s',  W.  loii^.  71    .'J.J'Jii  I'.'i  to  171  I'atlioiiis,  1  S7'J- 1  .ss."i. 


I. EDA  CAUDATA  (Donovan). 

(I'l.ilr   l..\\\ll,   li;;.   1.) 

Ann  riiiiiliilii   l»(i\ii\  •  :,•,  I'liiiisli   .'^liclN.  pi.    lAwiii:  <  liciiii  iil.,  p.  "•().  pi.    \\ii, 

li^M.  N    IL'. 
/.((/((   I II  mill  lit    LoVl'  \    I  ml.  Moll.  SiMiiil.,  p.  ;!l.      (lui  l,|i,  li'ip.  on  lii\  cii .  ol   Mas-,., 

liiniu-v'.s  ((1.,  p.    Mm,  lii;.    171,  isTC— TUM is .  .\mci.    .Mai.  <'oiiili.,  p.    isj.  pi. 

WW  III.  li-s.  IMI.  I'.l.",,  187:i. 
t.rdii  I'fniiiht  \  I  itiMil,  Trails,  ((iiiii.   A<a<l.,  \  ,  p.  .'.71.',  IS.^^J.  in    pari;    \  1.  |i.  L'HO, 

jil.  X\\,  Ii;;m.    11,11.1.    INM.      1>.\I.I  ,  Uiill.    r.   S.  Nat.    M  ii-..   No.  :,7.  pi.  \  i  \  , 

I'lKs.  II,  M„.  is.sp.  — (  ;  ,|!r--ii.  Hull.  .Mn-.  Coiiip.  /o,.l.,  .\.\I1I.  p.  L':t|.  IMK!. 
J.idii  liiiidttlit  \  KUKii.i.  and   Iil  .sii,  .\imr.  .louni.  f^v\..  Ill,  p.  51,  liy.  Jit.  .laiiiiaiy, 

is;  17. 

This  (l('('|H'i- water  lunii,  prrviunsly  ideiitiliiMl  as  Liiluinrinihi.wns 
round  at  a  \t,'ry  lew  stations  iM'twccii  N.lat.  I'J  ."17  ,  W.  lun.L;. (!!•  ."><•'.  aiid 
N.  lat,;;7     KI'.KI'  .  \V.  Ion-;-.  71    !.'(»' ;}(>",  in  IdL'toHH  tatlioni>.  l.S7l-lS«r., 


I 


LL:UELLA    Vci-fill  mid    lUi^h,  18U7. 

■hnioiiiii  i>VMiKS/..\,   Nnnilidi   tiiviarir  :iicriil.  d"   llal..  If,  .Ai'ad.   l.in.ii.  p.  1 1 7."i, 

1X77  1  not  of  II  (  iiM'.K  . 
I.tidillii   \iniiiii   and    I'.l  --ii.  .\iiii>i .  .loiirii.  Sci.,  III.  p|i.  .M,  tlL',  .laiiiiiii.\ .  |sii7. 

"fllii . —  I. nit  I  hi  III)  sstiiit  !i,sis  (Sront'liza). 

'1  ids  {fniiip  inrlinios  a  lar^r  nuinln-r  of  small  sprcics.  lioih  li\  inji  and 
fossil,  in  wldch  the  sludl  is  rathcf  slioit,  usniilly  ovate  or  swollen,  w  itli  a 
;>inall,  iieiite  or  siih;i«nt»'  iinicaiiafr  rostrum,  sit natcd  medially  or  snh- 
medially,  and  dctincd  i>elo\v  hy  an  eiiiar^iiial  ion  or  nmlnhil  ion  in  the 
posterovtMifral  miuoin.  'i'he  poHtoro-doi'snJ  mar^iin  is  eonscx.  Tho, 
eM'uteheon  or  lioanienlai  ar«'a  is  v«'ry  distinctly  defined  l),\  lliee:irinii, 
lint  is  not  .sunken.  Tiie  chondroplnire  is  usually  small  liii-l  distinct.  The 
siphon  tulu's  ;ire  .se|»arate.  at  least  in  sonu'  ^jiecies.  1 1  iiiclinio  numerous 
minute  tertiary  species  icr  ired  liy  Seouen/a  to  the  -ection  of  lulu 
nam«'d  hy  him  '/inKniiii.  ii\u\  al.so  a  considei  alile  number  of  recent  deep 
water  spi'eie.s  gi'iierally  de.serihed  li\  aiitliois  under  It  tin.  \>  the 
name  •Iniitmia  \va.s  preoe(Mipied,  the  yroup,  wldch  seemed  to  he  id'  i^cneric 
value,  reipiired  a  new  name. 

The  foll«»\\  iiij;-  species  ap|)es\r  to  helont:  here: 

Jj.  atiiiiiiulii    (rtegueu/a),    /..    iiiiohn    (Seguen/.u),    /..   ptitijjinis   (fcse- 


sr,n 


mm  ]■  i'i)i\(,<  or  Till:  ytrtny.ii  vrs/vv. 


vol..  w 


jiiicn/a,  /..  iiitiilnrsatK  (S»';iiu'li/a).  /..  (■«»»/"».s7f  (St'j>iU'ii/ii),  f(>ssil;  /,. 
solitluhi  (Siiiillii  :in<l  /..  siinra  (Sinitli).  iVoiii  olV  Mra/il:  /-.  rotij'ntis 
(Siiiilli").  titV  llu'  .\/.»»r«'s;  /..  ///<)/>/»((/<((  Smith),  /,.  /ov(/^(//MSiiiitli),  and 
/..  ultima  Smith  i,  IVom  tlic  Patilic:  /-.  /Hr.s-.sw/jr»,v/\  (Scgiicn/.a),  frttm 
oil'  th«'  l»arl)a(h<.«<.  iioithwaid  :  /..  iinssdnnisis  (>>{'<rnvu/.n  \  wiv.  snhlrr is 
N'cnill  and  I'.nsh,  oil  hflawair  Uay,  northwaril ;  and  I.,  ixitra  N'crrili 
aixl  Mush,  (ill   Marthas  Nincyard. 

LEDKLLA   MKSSANENSIS  ,  Seguenza). 

( I 'hi  I.'  I..\.\.\l.  liu.  it.) 

lain   iiiiiiiiliiiihi  .Iiiii!!^-.     \iiii.    Mil!.;.    Nat.    Hist.,    \<.   (i!',   .Inly,    1H7tl   iimt    \'u\ 
Iticil  1.  -  Si  (iiiN/.A,  .Nik  iiliili  It-r/iarii'  iiHMid.  il'  Hal.,  li.  A<a<l.  I.iinii,  isTT. 

|1.    11"".,   III.   Ill,   \\iiH.   1.".,   l.")(l,    !.".<. 

I.iilfi  Hi(.v.i(i»r.'(v(.N  ,li:i:ii;i:\  s,  I'lcic.  '/.oi'A.  Soc.  I.iiinloii,  i).r-7(i,  .lime.  lH7!t. — SMiiii. 
v..  .v.,  K'liiiiil   \'(iy.  (Iitilliiiiin-,  /oi'il.  I.aiiii'lliluaiiilii.ila,  \  I  il,  p.  L'l!7,  ISs", 
l»Ai!..  liiill.  .Mii,>4.  ((iiiii),  /oi'il.,  Ml,  p.  21!',  ls.sti;  Hull.  r.  S.  Nat.  .Miis.,  .\.., 
;::.  11.  II.  isMt. 

Tin'  shell  which  is  licrr  i'('j;ard«M|  as  the  1  rue  »/r.v.s«f*/r/(.s/\  i.s  small, 
.swollen,  <»\  ate.  nraily  <'iiiii lateral,  with  ;i  distinct.  sIkhI,  oldiqiie  rostrum 
bent  (hiwnward  at  Ihe  lip  and  se|iaiated  from  the  body  of  the  shell  liy 
a  disiinct  de]ii'ession  and  mai^inal  indentation,  'i'he  shell  is  thick  ami 
solid  for  .so  .small  a  species;  its  surface  is  coveri'd  with  line,  i'e;.',nlai', 
raised,  thin,  concentric  lines  .seiiiuated  hy  widei- concaNc  ^^.ioon <•.-;.  'i'h,. 
liinjie  inai^in  is  thick,  stroiiji,  with  altont  seven  or  eii.;ht,  mostly  s  r<M):;, 
nearly  erect,  and  not  crowded,  te«'th  in  each  series.  The  <'h»>ndrophorc 
is  relatively  lai'^e,  trianynlai'.  and  projects  on  tin-  inner  maruin.  The 
epidermis  is  p;ile  yellow.  .Vc«'ordin<;- to  .Icifreys  the  siphon  tubes  an- 
ion^ and  se|»arate. 

licn^i'th.  about  2.<>  mm.;  heinhl.  about  _  mm. 

A  few  specimens,  at  three  stations  between  \.  lat.  .'^S'^  L*9',  \V.  Ion;.;. 
7;i  <.»',  and  N.  lat,  .".T  ,  W,  h)'!^.  71  ^  'iV.  in  IMlo  to  L',(iL'0  fathoms.  ISSl-S.".. 
South  to  the  r.arbados.  in  .'VJ  to  LMCl'l  fat  horns.— hwll. 


V 


No.  11 


LEDELLA   MESSANENSIS  (Sepuenza)  variety  SUBLEVIS,  new. 

.  I'lalo  l..\\\l.  lii:.  7.  i 

]iil(liit  tiiissiitii  iisix,  viiiicty  \i.iaai.i,    riaii>.  i  imii.  A<atl.,  \I,  j))).  Jl.'7,  L'.sd,  Issl; 

l".\]i!.  AiUiitrom,  \\v\un\  V .  S.  ('.im.  I'i.sli  ami  l'iMlnTirH  lor   |SM;|,  p.  .')7tl,  IKh.'.. 
l.eilelln   mfsiiiiiiisin,  vaiirly   \' iiuu  1.1.  ami    HiMi.  Aiiicr.   .Imirii.   S»  i.,   Ill,   p.  lid. 

li.U.  i:»,  .laiiiiary,  Is;i7. 

This  Nai'iety  diHers  from  the  foiiii  ;d»ove  described,  principally  in 
ha\  in^  the  conceiiiric  sculpture  w  holly  or  partially  ob.sidete  and  in  il> 
somewhat  more  elon.uated  form.  It  has  nino  <m'  ten  tt'eth  in  eaclr 
serii's,  due  perhaps  to  ilie  larj;'er  si/e  of  the  si>ecimen. 

< 'omparatively  tew  speeimeiis,  at  thirteen  stations,  ImM  ween  N.  I;il. 
41'  17  ,  \V.  loiijr.  Ill  T,  and  N.  lat.  .'{S  lM»  .  \V.  loiiy.  H)  S'  ;iO".  in  l.ls"^ 
t(» 'J,o;{;i  fathom.s,  ISiS.J-lvSSij. 


N".n:i'.i.  i>i:i:i'  11  A  I  i:i!  Moi.i.rsc.i-  }  i:i;i:u.i.  .i\i>  /;/>//.  s57 

LEDEI.I.A    PAKVA  Vcrrill  ami  liiish. 

rhitf  I.WXl,  n-.  I.  1 

l.xlillii  jiiirvii  \  i:i;i;ii  i.  .unl    Hr-ii,    \iiiiT.  .Iniiiii.  Si  i.,  Ill,  p.  M,  li^;.  Is,  .l:iiiii:irv, 
ISH7. 

Slicll  iiiiiiutc,  ii;iii(i\v  oVMlf,  llif  aiitcrini-  cml  tin-  loiiyii' niid  (»l)lll■^(•ly 
roiiiHlfil.  iiiid  till'  (tustci  ioi'  nitl  with  :i  slioit.  siilttniiicatc  iiitMiian  uis- 
tiiiiii.      I 'minis  soPM'W  liat  swollen:  beaks  ii  litllr  iiroiiiinciit  and  tiiiii.'d 
slii;liti\  hackwaid.     'I'lic  smtact'  is  nearly  siiiont  li,  show  ini;- oidy  inifin 
scopic  lines  of  jir<»\vtli.     The  aiitei(» dorsal  liiarj^iii  isi'Uinyated.  sliiiJitly 
et»n\  f\,  ami   slopes   \  ery  gradually  to  the   nmiidi'd    aiiteiior  «'iid  ;  the 
ventral  mai  uiii  i>  iMnadly  ami  evenl.N  eoincx.  Iml  suinewhal  pindifd  np 
jiosteiiiM  ly  tt»  Inrm  a  sljj;ht  rmarjiinat  ion   helow  I  lie  rostrnin.  which  is 
short,  narrow  .  sniitriimate  at  the  tip.  and  is  delined  iiy  a  sliuht,  ineon 
spiemais  rid};e;  tin*  postero  dorsal  margin  is  nearly  st  rai.L;lit  and  sh)pes 
rapidly  to  Jlie  upper  an^h'  "d"  the  lostriiin.     The  hiiijuf  plate  is  slroui;'. 
••onsidei  altly  t  hiekenetl.  wit  li  a  \ cry  olitiise  anuh-  at  I  lir  licak  :  t  lie  ante 
rior  ]>ortioii  is  the  loii.ufr  with  thf  inner  niainin  eon  v<\,  and  l  hi-  posterior 
jiortioii  is  the  wider,  more  ol)li< pie,  with  the  inner  margin  ><l  rojij^ly  eon 
cave;  the  plain  ouier  margin  is  sharp  and  piojeets  considerably  al»o\c 
the  teeth  whii'h  are  stroii}'',  stand  nearly  erect,  and   arc  h  ss  Vslia|>etl 
than   usual.     There  aii'  about    lilteen  in   t  he  anlcrioi'  scrit's,  of  w  hirli 
three  or  four  proximal  ones  ai*-  ipiite  small,  and  nine  si  on  I  cr  ones  in  the 
posterior  sci'ies,  iiicludiuj;" one  wry  small  one  next  tiu*  lieak.    'I'iie(  lion 
di'ophore  is  rather  small  and  deep   with  a   ilistiiictly  projcclinL;  inner 
edjut'. 

liCii^^lii.  ■>  mm.:   Iici^hl.  _  mm. 

()ne  val\e  (No.  7S;i(l,"»).  station  L'lls't.  ,,|V  MmMlias  X'ineyard.  in  ."»•_'.'» 
fathoms,  ISStl. 

'I'liis  species  seems  to  be  closely  allied  to  I.,  snnni  fSmitln  from  off 
the  coast  of  ISra/il  [  N'oya.iicol'  t  he  Cliiillniiji ;  i.  but  that  species,  although 
of  tin'  same  >\m\  has  fewer  teeth,  nine  ol'  w  hieh  ar(^  sai«l  be  anterior  and 
twelve  posterior. 

F^Oh^Tl.A  ND!  A    Mmi.Ii,  I;jn7. 

I'mlliiii'liii  \iia;iii   .Mill    llr--ii.  Amci .  .Iituni.  Si  i  ,  III    |»|i.  M,  il.'.  .l:oiii:ii  \ ,  Isi'T, 

Ttifu .  -   I'm  lldiidid  tirfti((i{i  I  ray)  1S1I>       /,( ihi  i>i>iiliiii>liiii  ( llitclirdck ). 

We  coiisid«'r  this  a  distinct  u'cnus.  but  would  lestriit  il  to  theoii;^' 
iiial  type,  unless  a  few  species,  which  we  ha\  e  not  seen.  >lionld  pio\e  to 
lielony  to  it .  Iiiaiiy<'aseil  does  imt  appi  Mthat  aii\  of  the  noithcrn 
species  of"  l'airo|M'  and  .\inerica  that  ha\e  been  referred  to  it  aie  really 
closely  allied  t(»tlH'  type.  In  many  respei-ts  this  ycnus  is  intermediate 
betw'een  l.rthi  and  Vohlin.  In  its  tdosetl  shell,  detinite  rostrum,  eti-., 
it  ajj;re<'S  more  nearly  with  the  Ibrmei.  but  in  j;ciieral  outline,  with  the 
latter. 


PHH 


808 


ruoi  r.i.niscs  of  tiu:  y.rrio.wn.  .i/r.s/r.y. 


Vol..  w. 


YOLDIA    Mollef,  1842. 

Ytildiu   \i;iti!ii.i    .iiiil    I'.i  -11,  AiiiiT.  .loiiiii.  Sri.,  III.  ]i|i.  ,Vi,  (!•_',  lii^H.  IL',  M,  .hum 
iiry.  IS!i7. 

Ttii>r. —  Yohlid  liijiKrlmrra  T«>rrt'Il=:  Volili<(  urrthn  M<'iller  (not  (li'ay). 

We  liavti  i«'.stri('t(Ml  this  ^cmis  to  tlu^  typifiil  fonn.s.  .such  as  V.  Vnun- 
tiiht  (Say).  V.  s(iin>till(t  HWmUl),  Y.  mi/alix  iCoiithotiy  1,  and  nians  closely 
allied  foiei};ii  species. 

These  have  a  nearly  smooth,  eonipressed.  lanceolate,  j^apin^  sliell, 
more  or  less  prolonj,'ed  and  tapered  posteriorly,  with  a  poorly  <lelined, 
wide  I'ostrmn,  ^icnerally  withont  i'arinations.  The  external  li;.;anieiit  i•^ 
niaijiiiial,  I'eehly  (h'veloped,  c(»ntiniions  undei-  the  beaks,  and  not  nniiii 
dilVerenliated  Iroiii  the  jreneral  epidermis,  Tiie  chondroplinre  is  larjic. 
concave,  and  projects  williin  the  marj^in.  The  pallial  sinns  is  laiuc 
and  deep.  The  siphon  tubes  and  posterior  pallial  tentacle  are  ion-. 
The  palpal  tentach's  are  hm;:-  and  lai)ered:  in  lite  they  may  e.vteiid 
nearly  to  theeiulol"  tlieexi)anded  siphon. 

ADRANELLA,  new  subgonus  of  Yuldia. 

Tjfpi'. — Aditoirlld  <(i:<((>,  new  species. 

This  sui)^('nns  is  iillied  to  Yi>l(liii.  but  is  distinjiwisbed  by  its  obloii;,^ 
t)vate,  compressed  form,  with  a  broadly  rr)und«"d.  jtosterior  end,  ha\  in;; 
a  very  small,  nearly  obsolete,  rostrum.  Surface  sculptured  with  dis- 
tinct, raised,  conci'ntiic  lines.  Ilinj,^'  plate  and  teeth  strong,  liesiliiint 
occnpyiny  a  distinct  i>it  in  the  apex  of  a  lar^^e  shelf  like,  trmnuulai 
clM)ndro|)hoie. 

YOI.DIA   lADHANKl.LA'   CASTA,  new  species. 

I   I'JMl.-    I.\\\.    (iu.    1.) 

Shell  small,  oblonn  IIS  ate.  .sinnewhat   compressed.  iiie(|nilateial.  wilh 
the  posterior  eiiil   a  little  the  lonjier  and  considerably   the  broader. 
rml)(»s  small ;  beaks  cuived  inward   an<l   slii^htly  l)ackward.     .\iitc:(» 
dorsal  mi  irgin  sliyhtls  concave  near  tiie  beak,  a  little  <'onve\  opposite 
the  distal    teetii;    ant«'rior  end    a   little   mirrowed,  obtusely   rounded; 
vi'ntial  mar[;in  broadly  an<l  e\enly  rounded  with  a  very  faint   uiidu 
lation  pttsteriorly ;  jtostero doisal  marjiiu  a  little  convex,  sloping;  less 
than  the  anterit»r,  and  Inrnini;  up  at    tlu*  end  so  as  tc)  form  a  sli^lit. 
hardly  distinct  r(»slrum.     The  iiin;;e  plate  is  rathei-  larj^e  and  thick, 
especially  distally  011  each  side,  becoming'  narrow  and  turninj;  upw.inl 
at  th»>  iM'ak,  wlieie  it  is  interrupted  by  a  small,  lather  deep  I'-siii  il 
pit.  whi(!h  is  bordered  interiorly  by  a  thickened  extension  of  the  liin-v 
maVjijiii  forming  a  sort  of  shelf,  the  whole  constituting  a  broadly  Irian- 
gidar  chondr(»phore  with  the  pit  near  its  apex.     The  anterior  sen'->  of 
teetli  contains  twelve,  of  which  threeoi-  four  pr(>\iHnil  ones  an*  \ciy 
small,  and  form  a  series  whicdi  curves  upward,  exterior  to  the  clioii'h" 
phore,  and  tt-riuinates  at  the  superior  margin   of  the  shell:  the  ii'ih 


1' 


Ni)  ii:w. 


i>i:i:r-fv.i  I  i:i:  Mi>iJ.rsr.t—ii:i;i;ii.L  .i\i>  in  sii. 


S:.'.! 


hccoiiu^  l;ir;iT.  stroiiii,  and  tliicU  distiilly,  with  Innatl  V  .slia|i»Ml  buses 
hcparalfd  .>y  (le«'it  pits.  In  the  itostcrior  sciics,  wliii  h  is  a  little  tlic 
loii^tT,  there  are  eleven  tc«'th  corresptiiidiiin  in  foini  and  arraiiueineiit 
with  those  of  the  anteri(»r  series.  The  exterior  siirlaee  is  rej:iilarly 
8('nl[>tiire(l  with  itroiiiinent,  sharp,  eoneentri<\  raised  lines  separated  Ity 
wider  intervals.  Interior  very  ;:lossy.  Muscnlar  sears  and  pallial 
line  not  visible.      Ilxterior  senlptiire  elearl>  sei-n  tlirouLili  the  shell. 

lieii^fth,  1.2  mm.;  heij^ht,  L'.S  nun. 

One  valve,  amonj;"  l-'oraiiiiidlera,  station  Jl."))*,  N.  hit.  1.!  .'.I'  |.'>  ,  \\ . 
loiiff.  Sio  20'  10",  in  liS'J  fathoms,  ISSl. 

ORTHOYOLDIA  VcmmiII  iiiid  tin^h,  ISO?, 
OrtliDiiiihtiii  \  laatiii.  .iinl   lii'SM,  Aiiii'i-.  .luiiiii.  ><  i..  Ill,  pji,  ri.'i,  lii'.  .Imiiumi  v,  IS'.tT, 

T\ii>i. — Orlliojinhliii  scfipiiKi  (Dalh. 

Shell  oidoii;.;,  uapin;;',  blunt  or  roiiinled  at  both  end>,  wilhont  a  dis 
tinet   rostrum:     no   carina.       Tallial    sinus    Iar<ie   ami   broad.      Teeth 
numerous  in   both  series.      i>.  scupinii  (haliu  from  oil    llra/i;  and  o. 
solenoides  (I)all)  from  tlu'  West  Indies. 

M  E(iA  YOLDl  A    V.-iai  1 1   ii  iid    Uti^li,  tS97. 

Mt;liiiiuliliit  \Kiaai.i.  :itiil   lirsM,  Aiiht.  .louiii.  ^^<  \.,  Ill,  |i|i.  .'i."!,  t>2.  tiu.  17,  .lannnrv , 
ls!t7. 

Tifjn . — Mcijaj/ohliii  tinaiiivi'itfinis  (Storer;. 

We   have  established  a  new  };en<'rie  ^rdiip   foi'  this  lar,u«-  and  well 
known  species,  whieh  has  sometimes  been  referred  to  YoUini  and  some 
times  to  r<iftlt(iiili(t.     No  closely  allied  species  is  known.     It  is  pioba 
bly  thelarjicst  known  species  of  this  family  ami  is  remaikabh;  tor  its 
broad,  short,  compressed  lorm,  with  a  \cry  sinut,  blunt,  indelinitc.  pos- 
tt'i'o dorsal  rosti-iim,  and  with  a  low  radial  i'id,i;*',  eiidiiij.;"  in  a  po.>ier(» 
ventral  marj;inal   lobe.     The  <lion<lrophore  is  remarkably  lar;;<'  and 
stronj;,  i'oncave,  striated  within,  and  piojects  much  within  the  mar.Liin 
of  the  hi nj^e  plate.     The  pallial  sinus  is  lar^e  and  de«'p.     In  outline  it 
.somewhat  resembles  ty|»ical  l'i>rlli(iiiliii,  but  differs  in  bein;^  broadi'r, 
tiatter,  and  yapin^  at  both  emls,  and  in  lia\iiru  a  strongly  developed 
external  lipimi'iit.     I'rom  Yohlld  it  also  dilVers  in  the  last  (•iiaracter,  as 
well  as  in  outline,  but  aj;rees  w  ith  it  in  its  coinpi'es.sfd  ^apinu  shell. 

The  jiostero  ventral  mai'^in  of  the  mantle  forms  a  iniuch  like  piotni 
sion,  eorres[)ond!ii,i:  to  the  radial  i  i«l,i;e.  The  siphon  tul'cs  are.  lonj;  and 
united;  the  posteiior  ;tallial  tentacle  is  |.»n<;  and  --lender.  The  palpi 
are  very  larjj^e.  1'he  palpal  lenlacles  (»i  initiate  fr(»m  the  body  wall  at 
the  base  of  the  outer  [>alpi;  they  are  huiju  and  tliiek.  wiili  a  larp* 
furrow  on  one  siile. 


800 


ri;()ri:r.i)ixi:s  or  riii:  \  iri<>\  \i.  ur.'^rr.v. 


Vol..  X  \ 


)iihliii  riiinliirin  \'Ki!i:ii.i ,  Trans,  ("oiui.  AcjkI..  \1,  iip.  L'L'S.  27!',  iNSl. 
Mirroyoliliii  rcijiilitrlH  N'l.iaMi.i,  .iiid  Hi'sn,  Aiiic  r.  .loiirii.  .Sri..  Ill,  p.  .".»!.  li-s.  °.,  le, 
.laim.iry,  In'.i". 

This  sjH'cit'S  clo.srly  i'esrml)l('.s  the  vt'iy  yoiitiii  <»t  McudjlohliK  tlinicia 
Janiiis  (Ston'i)  \  t'lrill  iintl  I'.ii.sli.  in  the  cliiii  iictci'  (if  the.  liiii<;<>.    S|icci 
nuMis  of  tilt'  latter  ii»(')isuiiii<i'  .">."»  imii.  in  Inijitli  lia\<'  flie  rc'Iali\(l\ 
lui'};o,   coiicsivo,   caitilajic  pliito  Jii.st    Itct'oie    the   ImmUs,  \\lii(!li   cinvr 
stroiiirly  backwaid  and  arc  nearer  the  center  <>t  tlie  shell,  and  tliclcctli 
are  nior»'  nnnicroiis  and  inoic  slcndt'r. 

In  .1/.  nyiiluris  ^h^^  shell  i.s  cordate  ovale  or  veneriloiwn.  The  ItcaUs 
curve  stroii^My  toward  the  short  (iiiiterior  ?^  <Mid.  Tlieic  is  on  this  ciul 
a  sunken  lunnlar  area,  delined  !>>  a  slij^lit  <;r<)ove  which  indent-  tln' 
hiniit'-niai'.uiii.  I'hc  anterior  (  .'  part  of  the  hine(>  niaryiu  i.s  tlii<Kciied 
and  ihcur\('d  alonj;-  tiie  Inniile  and  hears  an  inner  rid,ue  and  lour  <'i  vc, 
small,  blunt  teet  h  of  which  the  ]>roxiinal  fwo  ])i'oieit  above  the  in  i  ^in 
in  a  doisal  view,  the  others  are  low  and  latlier  obseure.  I'ndci  rlie 
beak  the  hinu'e  i)late  is  thickened,  siniions,  edentulous  for  a  short  dus- 
tanee;  back  (  ?)  of  this  theie  is  a  larp',  thick,  obli»|ue,  eoiiea\e  eln»« 
drophore  which  occupies  the  whole  bi  'adth  of  the  hinge  inartriti  an«< 
pi'ojects  inward  bi'yond  it  as  a  shelf  like  bordt-r;  beyond  this  there  is  a 
series  of  six  or  st^ven  proiuineut,  blunt  teeth.  The  exteiinil  li;;aiiicnt 
lies  in  a.  distinct  grove  along  a  large  part  of  the  »Migeof  the  hm-cr 
(posterior?)  dorsal  inaruin  and  runs  under  tlie  boak,  but  fades  uiii  in 
front  of  it.  The  pallial  sinus  is  not  visible,  conseipiontly  i'  i"^  »i>t 
possible  to  decide  winch  is  the  anteiior  <'nd. 


Nn.  li:i'.l. 


iti:i:i'ir.iTi  i:  mdi.i  isr  \  -vFinni  i.  .i.v/»  lusii. 


sin 


l'>iit  one  s|)»'ciiM('ii  iVoiii  st:itiiiii  l!l!».  ntV  Tliiilclit'is  Islaiid,  in  IK 
fiUlloms,  ISTS,  liaH  Imumi  rrH'ncd  to  lliis  species,  ln'sidcs  tilt-  l\p(' 
spcciiiit'iis  (No.  ;;,S|'J()>  stiilioii  1(>'.>.'.,  otV  Mintliiis  \iiit'\ mil.  in  '!ll» 
rillliuiiis,  ISSL'. 

YOLDIELLA    V.-riill   ii  in  I    lii  isli,  I  s- 17. 
)'iil(lifllii    \il!i!iii.  Mini    I'll  ^11,   Amtr.    .Icviiiii.  Sci.,  Ill,  |i|i.  "i."!.  •;;;,  .l;inii;ii  \ ,  Is'.lT. 
'll/jlt'. —  Y()l(lirll((  llicidil  (l,(»\rli). 

Tin's  j^rniip  iiifliKlcs  ;i  liii'^^c  minihor  of  small,  mostly  (Iccpscii  spi't'irs 
w  itii  jilossy.  iridcsiT'iit,  ovate,  and  nsnally  wt'd^c-sliaped  shells,  n<'arlv 
always  lia\  in;;'  a  slijilit  antrro  \  antral  sinuosity,  wldeli  Jeehly  deiines 
ill!  obsenre,  hhiiit,  roslal  region,  without  aii\  ilclinito  eaiiiiation.  'I'lie 
shells  do  intl  ^ape,  but  close  lij;iitly  oxeejtt  that  at  the  rostral  aiiL:le  of 
some  species  there  may  be  a  sli«;ht  diverj;«'nce.  The  internal  cartila;,^', 
whieli  is  olten  relat  ively  larne.  occupies  a  simpl«'  notch  which  iidcr- 
rupts  the  hiujue  margin  more  or  less  completely  and  ucnerallx  shows 
e\ternall\  in  a  dorsal  view  :  the  notch  usually  teiiiiinates  within,  on 
the  inner  or  Iideiior  surface  ot"  the  liinj;e  plate  and  is  often  hounded 
within  by  a  sli^iit  riduc  A  weak  external  liiiament  is  picseut  on  the 
postero  dorsal  margin.  A  relatively  small  pallial  sinus  has  been 
obser\ed  in  several  of  tlie  species,  but,  is  usually  imli^tinct.  The 
siphon  tul>es.  as  obserxed  in  a  lew  of  the  species,  are  slemlei-  and 
united  for  more  than  half  their  leii<;t)i. 

'i'lie  fbllowiuji'jire  some  of  tile  species:  ).  hiciihf  (Loscm  \  «'rrill  and 
liush,  Y.  iris  N'errill  and  I'.usli,  and  \ar.  stricla  \'eri  ill  and  i'.ush, 
Y.  in/fatd  N'eirill  and  Ibish.  V.  im  niisinrini  N'eriill  ami  i'.ush,  and  Y. 
jifl'rvjiHi  (IlidaliiO)  NCrrill  ami  Ibisli.  oil' Cape  Ilatlcras,  North  Caro- 
limi,  northward ;  Y.  <1i.ssinii!ts  \  Crrill  and  l>usli.  iiortli  of  Cape  llat- 
teras,  North  Carolina,  noitliwani ;  Y. /rtitoim  N't-rrill  ami  I'.ush.  olf 
('hesapeake  I'.ay,  northwar<l :  Y.  niinnsritdt  \ Crrill  and  liush.  ami  )'. 
sii}tniiiH«i<)((\vvv\\\'.\\\A  I'.ush.  otl"  Delaware  Hay.  noithward :  Y.  /'li 
(/i(h(  (Torell)  \'errill  and  I'.ush,  and  Y.  ciirfu  \ drill  and  lliisli.  oil  Mar 
thas  \'ine.vard.  iiorthwaid;  Y.  .sidxdufiilnhi  N'eriill  ami  I'.ush.  ami 
Y.  IcnficuUi  (Mt'dlei)  N'errili  and  I'.usli,  var.  nuihlio  \  errill  and  i'.usli. 
dull'  of  .Maine;  Y.  cxjHxvsn  (.letfreys)  \errill  ami  I'.ush.  olV  (iiand 
I'.anks:  Y.  parliio  \errill  and  I'.ush.  southern  ;  1. //«///#/ 'Smith  >  X'errill 
and  r.iish.  North  I'acilie. 


YOLDIKLLA  LUCIDA  (Loven  i  Vcrrill  and 

(J'lMt.s  I,.\\\1I.  li};.  J;    I.XXX.  liR,  :«.) 

YithlUi  liirida  I.oVKN,  Iinlex  Mollnsconim.  |i.  ill,  IMtl. 
.'/,((/((  oliind  Stimi'son,  Proc.  itoNtun  S.k  .  Nat    IliHt     I\,  ]i.  li:!,  IX".!:  SIu-Dm  New 

V.Uji.,  ]).  10.  iil.ii.lif;.  1.  isr.l. 
laid  hicida  .lia  I  ia:vs,  Itritisli  <  Oiicliulony.  N',  p.  ITil,  |.l.  <  .  li;,'.  I.  INJ'.t. 
)'tildia  ohcM  (Joui.i),  Ifi'p.  KM  li's  •  ri.  I"'    Mass.,  itinnny'H  <«<l.,  p.  I •">.■">.  (i;;.  4<»;{,  ls70. 
L<:da  nhcm  TitvoN.  Aiiier  Mar.  Cinicli.,  i'  1X1.  |il   \n  »  vm.  lij^s,  Whi,  TiUl.  1S7;(. 


Sf]2 


i'nnci:r:i>i\t;s  of  riii:  .v.r/vov//.  \rrsi:rM. 


vol..  XX. 


)<ililia  oliiHii  \i;i!i;ii  I.,  .\iikt.  .Ictuni.  .'^<i..  \  II,  iip.  iti,  Ml'.  .">n:;,  1H71.— Smi  rii  iiinl 
IJAiK.i'.i;,  'rums.  Coini.  .\(!iil.,  ill.  pp.  IS,  j;!,  I.STI.  \  kimiii.i..  i'.xpioratioiiH 
Ciisfo  liiiy,  pp.  ;r>L'.. '!(),'*!,  IS7I;   liivort.  Aiiiiii.  X'iiiiyiird  ."^il..  ]).  :!!••!,  I.'^TI. 

rorlliiuiliii  linidii  (i.  O.  S.\i!s.  Molliiscii  Ii'c^.  .Vrcticic  \(irvof;i:i',  p.  liT.  pi.  I.  li;;H. 
X(i,sl,.  1»TH. 

I.iilii  hiiiilii  ,lr.i  TUF.Ys,  Proc,  /(t(il.  Soc.  London,  ]i.  ,"7X,  ISTil. 

)i>liHa  hiridii  \'i;uitii.i,.  Trims,  (linn.  Acid.,  \',  i>l.  xi.iv,  lifj.  l.lSSi';  vi, )).  L'7!t,  IHSJ 
I  in  )»jnt);  I'iXpl.  tllialnms,  I.'cpoit  I'.  S.  Coin.  I'ish  Jind  I'iHliciii's  for  IHS;{, 
]..  .'.7<l.  is.v",  (ill  p!irt).--I!rsll,  I'lnli.  .Mus.Coinp.  Zo.'..|.  .Will,  )>.  L':i;!,  lH!i:;. 

)ol<lifllii  hiciilii  \i;i:i!n,i.  and  lir^ii,  Ann  r.  .lourn.  Sci..  HI.  p. ."),",,  |"m.  1 1,  .laniiary, 
l«!»7. 

Shell  .'siii;ill.  swolloii.  snboviitr,  with  a  ]toat('ri(»r  aiitilo.  siiiootli,  or 
inon'  or  h's.s  .st  licilatf,  iiidcsct'iit.  The  imibo.s  are  but  little  proiiiiueiit, 
iiifntiit  of  the  iiiiddle;  llio  boak.s  interrupted  or  obliterated  by  the  dark 
central  eartilaj;e  wliieli  oeeupie.s  ;i  relatively  huj^e  luttch  int<'rse<*tin^f 
the  entire  thiekne.s.s  ol'  the  hin^^'e  niarj^in.  'i'he  antero  dur.sal  inarfjin  is 
convex  with  the  edj^c  a  little  expanded:  it  .slopes  rai)i<Ily  from  the 
beak  to  the  anterior  end  which  is  obtusely  rounded :  the  ventral  nuir- 
jjin  is  br(»a<lly  and  re^idarly  cur\ cd  lu'arly  to  the  posterior  end  where 
there  is  u  .slijiht  protrtision  eorresjjondinj;  to  u  faint  undulation  of  tlu> 
surface;  the,  posterior  end  is  somewhat  wedji'e  shaped,  a  little  coin- 
j»resse<l  and  ta|iei'ed,  and  nuikes  a  distinct,  but  ol)tu.se  an^le  where  it 
joins  the  dorsal  mar;,dn  in  lin<^  witli  a  rounded  posteritu*  rid<.:'e  rujinin<r 
from  the  convex  part  of  the  umbos;  just  liclow  the  aujile  the  mar^iin  is 
usually  convex  or  sulitruncate  and  without  any  delinite  lower  anyle; 
the  posterior  dorsal  niarjiin  slopes  less  rapidly  than  the  anterior,  is 
nearly  straij^ht  with  tli«!  edjuc  compressed  and  a  little  expaiuled  into  a 
thin  keel  which  is  usually  sli;,:litly  convex  in  tiie  middle.  The  hin}.;e- 
niarjiin  is  strong:,  somewhal  |)rolon^ed, scarcely  aniiui.. ted  in  the  middle; 
tiu'  part  in  front  of  the  ('hondrophore  is  well  arched  and  bears,  in  the 
lar;,M'st  specimens,  nine  or  ten,  sharp,  prominent,  anyulai-  teeth,  of  which 
twoortiiree  nearest  the  beak  ai'c  (piite  small ;  the  jtosterior  i)ortion  is 
nearly  straiylit.  a  little  lonjjerand  narrower  than  the  anterior  and  beais 
about  eleven  thin,  shai'p.  erect  teeth,  counting"  oiu>  or  t  wo  minute  proxi 
null  ones:  a  thin  smooth  marj:in  extends  outside  both  .series  of  teeth. 
The  cartilage  pit  is  relati\ely  larj-'e,  in  the  form  of  a  iu)t('li.  and  cuts 
throufi'h  the  hiiifje-niarjiin  into  the  substance  of  the  beak  itself;  it  is 
occn|»ied  by  a  daik  br()wn  re  -ilium  which  usually  shows  plainly  exter- 
nally, .lust  in  fiont  of  tlu'  caitila.:.;('  pit  on  its  border  within  the  series 
of  teeth,  there  is  a  small  conical,  tooth  like  ])rocess  in  both  valves.  Tiic 
lij;ainent  is  thin  ami  delicate.  I'-xternally  the  shell  is  covered  with  ;t 
jilos.sy,  yellowish,  or  ])ale  olive  epidermis  which  reflects  brilliant  ])ri< 
luatic  colors;  the  surface  is  nuirked  by  faint  liiu's  of  grow^th  aiul  frr 
quently  also  with  line  concentric  j^rooves  or  sulci,  especially  toward 
the  ventral  and  anteiior  marv,'ins:  in  many  specinwns  these  are  ab.seiii. 

I.en.uth  of  one  of  the  larj^est  specimens,  7  mm.:   hei;;ht,  4.2."»  mni.t 
iM^'adth,  .">.L'  mm. 

Found  in  small  numbers,  at  many  stations,  between  >i.  lat.  43-  3!>', 


NO,  IKt'.i 

AV.  1. 
.-.It J  li 
Th 
si/e 
thel 
it  is 

])ost( 

smal 
Sp 
fectl> 
Si)it/ 
we 
deci( 
the 
doub 
placM 


Nrt.  unit. 


i)i:i:i'-WATi:i;  Mm  i.rsrA—VKnnn.L  i\n  nt  sii. 


«n3 


A. 


I 


\\  .  Imiim,  CD    L'L".  iiiul  N.  lilt.  .;:,     l-    lo  .  \V.  I,,ii-.  7l    :.7'  i:.  .  in  •_'•_»  to 

r.i«;  (afi s,  is7L'-i,s8r». 

The  most  prominent cliiiiiifU'r  (»r  tliis  sjn'cics  is  tli«>  iclativi'ly  liiruo 
si/c  ot"  llic  ciiitilajif  pit  uhjcli  intersects  liotli  I  lie  liin^e  !n:ii  ;;iii>  and 
the  Iteiiks  and  is  tliei«'ton'  plainly  visible  tVom  the  exterior,  hi  outline 
it  is  similar  to  ) .  iris  and  )'.  Injhilo  but  is  nioro  pointed  and  mirrowor 
postciiorly  tliun  either  of  them.  They  dill'er  also  in  havin;;  mneli 
smaller  eaitila^i'e  pits  and  in  tiie  nnml)er  of  the  ti'etli. 

Specimens  Ibrmeily  identified  as  Yohliti  (»/>r.s7(  Stimpson,  a.i,Meo  per- 
le(;tly  with  aiitliiMitic  speeinu-ns  of  litcnhi  sent  by  Doctor  l-'riele  from 
Spit/.ber^-'en.  As  iion«' of  the  species  known  to  us  ajjrce  snthciently 
well  with  the  des«Tiption  and  (i<,nire  of  Ijdit  tihiwtt  Stiinpson,  foi-  ns  to 
decide  deliniteiy  as  to  its  coirect  position,  unless  we  are  to  consider 
tln!  ligiire  a  very  incorreci  representation,  we  prt'fer  to  let  it  remain 
doubtfully,  as  a  synonym  of  V.  hiiitht.  where  dellreys  and  ntlieis  liasc 
placed  it. 

YOLDIKLI.A    IRIS,   new  species. 
(I'liil.'s  l,\\.\,  li-s,  I.  L':    I.WXII,  li-.  11.) 

Shell  small,  tiiiu,  lather  deli(Mte,  lon^.'-ovate  or  ovate-elliptical,  with 
tile  beaks  in  front  of  the  middle,  not  much  swollen;  snilace  smooth,  or 
nearly  so,  with  brilliant  iridescence.  Tlu^  antero dorsa!  margin  is  con- 
vex and  slightly  .arched,  slopinj;*  },nadiially  to  tin;  obtusely  rounded 
and  slij^htly  produced  anterior  end;  ventral  margin  very  broadly  and 
evenly  curved;  posterior  einl  obli(|ueIy  iiscendin^-,  obtusely  pointed  or 
rounded  at  the  tip  with  a  slijiht dorsal  anovulation:  posterc. dorsal  mar 
^in  slightly  convex,  slopin;.''  but  little,  ]iinclie(|  nu  into  a  thin,  rather 
prominent  keel.  The  umbos  arc  small  and  proiniiieiil  with  the  beaks 
small,  (Mirved  inward  and  bat-kwai'd.  closcdy  appressed  to  the  maijiin. 
The  epidi'rmis  is  ;ii'iiyish  tu- {greenish  yellow,  smooth  and  shiniii;^;  the 
surfac«ws  brilliantly  iridescent,  covered  with  faintly  marked,  line,  c(»n- 
centric  lines,  most  <listinct  near  the  \ciitral  maijiriii  and  anteriorly ; 
under  the  leua  these  appear  like  faint,  close  nndnlations  n\  er  most  of 
the  surface.     ICscutche(Ui  <lcliii((l  by  a  well  inarUed  depressiun. 

The  hinye-maiyin  is  tlii(  kcned  and  forms  a  very  obtuse  anjilc  at  the 
beaks;  the  itosterior  portion  which  is  (uily  sli;vhtly  (Mirved  distally  is 
louf^er  than  tlu^  anterior  which  is  nearly  straijvht.  In  tiie  lar^^est  spe(;i- 
mens  there  are  twelve  or  thirteen  acute  er«M't  V-shaped  teeth  in  ea«;h 
series,  includiuj''  one  or  two  minute,  ]»ro\imal  o!i<'S.  The  resilial  pit  is 
minute,  situated  (ui  the  inner  face  of  the  thin  edentulous  hiii;:e-plate, 
beneath  thcj  beaks,  ami  faces  ventially  so  that  it  is  sciacely  visible  in  a 
front  view  and  but  partialis  interrui)ts  the  hin<ie-pli'.t;s  Outside  the 
series  of  teeth,  on  both  sides  of  the  beak  there  i.-  a  smooth,  raised 
margin. 

Leiifjth  of  «)ne  of  tlie  laru«'r  specimens.  7.">  mm.;  height,  "i  mm.;  from 
beak  to  postcuior  end,  l.."»  mm. 


i; 


.    ! 


^..IJJ'I 


«n4 


ri;'K'i;/:nf\f:s  or  Till:  vc/vovir  vrsrrn. 


Vol..  XX. 


r<  III  III  I  ill  riMisiilri'iililr  II II  III  I M -IS.  :it  ill  )i  lilt  rmt  y  li\  <•  sliitimis,  lid  wt-iii 
N.liil.lT  10,  VV.IuiiM.  17  ;;.")' ;{(»',  and  N.  hit.. •..■■)  lU  In  ,  W.  |ni|o.  7  |  ^ 
.".7'  I.')",  ill  L'(».\  to  7S1  liitlioiiis,  IHT-'-lSSC. 

This  ,s|u'«i('.s  i.s  more  rlnimatet!  aiiil  iikhc  rojiiihiiI.\  <'Ili|iti(iil  I  limi  any 
of  llic  allietl  s|ic('i('s;  llic  liiii;;*'  iiiai-;'iii  is  al.so  Ics.s  aiij^iilalni. 

A  .siii<il»'siM'ciiiu'ii(N<>.7  l.".L'.">),slaIi(»ii  l.'J.  (ilVCaiic  Saldf.  itilto  fat  In  mils, 
IS77.  at  lirst  tlioiiuiit  to  be  a  distinct  s|KM-i('s,  dillers  linin  the  typical 
loiiii  ill  hciiiL;-  iiioic  <»l)h»ii;,  with  tiu!  ventral  iiiar^iii  less  curved,  the 
posterior  ♦•iid  more  evenly  roiinded  willi  only  a  sli^^lit  indication  of  ji 
superior  anuiihit  ion,  so  that  the  shell  has  a  pretty  re;;ular,  narrow  ellip- 
tical I'oriii.  In  all  other  resju-cts,  however,  it  ajiifcs  well  w  it  h  tlm  ordi- 
nary  form.  'I'his  specimen,  which  receives  the  varietal  iiaiiio  .s7//(7/(, 
is  liji'iired  on  I'late  fiX  \  \,  lii;.  1. 

lieiifilh.  ."•  mill. :  liei;;ht.  •!  mm. ;  lueadth,  I.',  mm.:  length  from  Iteak 
to  posterior  end.  ■"•  mm. 


f 
I 


YOLDIELI.A   INKLATA  Verrill  and  Hush 

(I'l.itrs  I.WX.  li-;.  S;    l.WMI,  liMS.  .-..  (I.) 

\nliliii  liiridit  \  i;i;i!ii  1..   I'lMiis.  (  (imi.  Ai'.iil.,  \\,  ]>.-''■*,  issi  1  jn  jmrl.), 
]<>l<liill(i  iiijliila  \i:i!i!ii  I,  iniil    l*>i  ■~ii.  .\iiicf.  .loiini.  Scj..  III.  |..  ."id,  l'n;s.  .i.    I.  II, 
.l:iiiii;iry,  |S<17. 

Shell  small,  swollen,  rather  short,  subovate,  with  the  posterior  end 
broad,  anunlated  jiostero  dorsully :  beaks  al  about  the  anterior  third; 
surface  smooth.  Antero dorsal  mai<.;in  remilarly  convex  and  slopiiiL; 
rapidly  to  the  anterior  end  wliicli  is  evenly  rounded,  \eiy  olitiise,  and 
passes  insensibly  into  the  evenly  eurved  ventral  margin  wliicli  is 
(U'cidedly  convex,  althoiijjh  tlu^  decree  of  convexity  varies  considerably 
in  dilferent  specimens;  the  p»)sterior  en<l  is  oldiipu'ly  snbtriineated, 
with  an  obtnse  curve  below  and  an  obtusely  rounded  anjj;le  at  its  upper 
extremity  where  it  Joins  tlu'  nearly  strai;ilit  postero dorsal  marj^iii. 
The  umbos  are  full  and  well-rounded  but  not  Vi'iy  prominent;  the 
beaks  are  small,  directly  incurved,  appressed  to  tlu'  mai';,nn.  There  is 
no  distinct  liiimle  but  the  margin  is  sli<;lilly  i>inclied  ii|>iii  a  small  crest 
both  before  and  behind  the  beaks.  The  ligament  is  delicate  and  show  s 
slightly  on  both  shies  of  the  beak,  I'liidemiis  jiale  olive  yellow  or  straw 
col(jr;  sniliice  smooth,  sliinin;;',  rellectiiifj  prismatic  colors,  sliowiii. 
nioreoi'  less  distinct  lines  of  <>rowtli  which  .sometimea  become  refjiil.i' 
coneentric,  very  line  striations,  especially  anteriorly.  lliiij;e-mar<riii 
well  de\eloped,  moderately  broad  and  considerably  thickened,  formin.u 
an  obtuse  anu'le  at  the  beak  where  it  is  thin,  encroaclnMl  upon  by  tin- 
beak  and  interrupted  liy  the  cartihiji'e  pit;  tliii  two  i»ortions  are  ncMi'y 
e(|nal  in  length,  the  anterior  somewhat  arched,  the  posterior  iiciiily 
straiji'ht,  each  lia\in;:"  a.  thin,  smooth  border  above  the  teeth,  alu^it 
equal  in  breadth  to  the  hiii^'c  plate.  In  the  larj^est  specimens  there 
are  iiin«'  to  eleven  (most  freijiieiitly  ten)  rather  stout,  annular  teeth  imI 
about  ten  vei-y  similar  posterior  ones;  the  cartilaj^'e-pit  is  small     nil 


N(i.  tl3l). 


i>i:i:rn  irri,'  Mdi.i.t  stA—vi:ui:ii  i.  asd  hi  sn. 


Sdfi 


just  IxMifiitli  t  lie  Ix'iik.  toiiiis  ;i  iMttcli  wliicli  »uiii|(l('U'l\  iiitm  iipl  >  Ilir 
lijii^(''liiiu-;;iii. 

Leiijitli  (»r  (die  of  ilic  liirjicst  siM'rimciis,  «»  iiiin.;  lM'i;;lit.  I..")  imii., 
tlii«'kiirss,  .'1  mill.;  Winn  Im-jiIc  to  posti'iioi  aii;^l»',  I  iimi. 

I'oiiikI  ill  (•oiisit|«'iiiI)l«'  iiiiiiiIkts,  at  aliuiit  twciitN  stations,  hctwi-cn  N. 
lal.  41  T).)  ,  W  .  Ion;;.  <;:»  .;:»'.  and  N.  lat.  .\'t  '.»  .'.(»",  W  .  h.ii-.  71  :.7  Ml  ', 
in  .*»!(»  to  IjiKi.S  fatlioiiis,  l.ss;$-l.s,s»;.  St-vi'ial  live  si(t'(;iiiu'iis,  at  sintion 
L'OTO,  ill  7r>  fathoms. 

This  .species  is  closely  ri'latetl  to  Y.  Iiitliht  (I.nvni  .  I'miii  wliieli  ii  is 
easily  separateil  by  it.s  shorter,  inoader,  nioic  .swolh'ii  form,  its  stionuiy 
curved  ventral  marjjin.  and  \-eiy  distinct  posteio  doi  sal  aiiuh-.  It  is 
sliorter  and  has  a  broader  posterior  end  than  most  of  the  related 
.species.     The  resiliuni  is  not  visible  externally. 


YOLDIELLA   SUBANGULATA,  new  species. 
(I'hiir.s  I.X.W  II.  Ii-.  ;i:   l,.\\l.\.  Ii-.  tl.) 

V<'iy  similar  to  tlu^  prtM'ydinji' species  in  form  Init  less  pointed  po.s- 
terioily  and  lai;;«'r.  'i'he  umbos  are  small,  not  prominent:  beaks  are 
small,  directly  iiniiiNcd,  appiessed  to  the  hinj,n'inai<^iii  bin  not  dis- 
tinctly notched  by  tin- resilial  pit.  The  iiiitero-dorsiil  .uai^iin  iscoii\e\, 
arched;  tlie  anterior  end  is  a  little  produced,  obtusely  r(»iiiided;  ven- 
tral inariiin  evenly  and  br(»adly  rounded,  .->Iij;litly  pKtdiiced  posteriorly, 
forniiii};'  an  obscure  obtuse  allele  as  it  meijics  into  the  posterior  end 
which  is  obli(|Uely  siibtriincated  or  a  little  inih'xed  in  the  middle,  with 
a  prominent  dorsal  aiij^le;  the  jKisterodorsal  niar^iin  shtpes  inil  little, 
and  is  nearly  straij:lit,  with  the  compressed  educs  forming;  a  slii^hi  keel, 
w  liich  is  a.  litt'e  c<»nvex  ill  the  middle.  .\  well  marked  ridj^e  runs  lo 
the  posti'i'o-dorsal  an;ile,  and  a  less  distinct  one  to  the  posiero  \  cut  i  al 
allele;  between  these  there  is  a  slijuht  depression  of  tlu'  surface.  Sur- 
face nearly  smooth,  lustrous,  retlectiiij;  prismatic  colors,  and  coNcred 
with  faint  lines  of  ;;rowtli  and  a  few  inconspicuous  irregular  sulci; 
epidermis  pale  oliv«' yellow.  The  hiiiu'e  inarjiin  is  narrow,  very  obtusely 
aiifiled,  and  is  intcrriipled  under  the  beaks  by  the  small  notcli  like 
resilial  pit.  The  anterior  series  of  teeth  is  slij.;iitly  anlied  and  con- 
tains about  seventeen  teeth,  including'  three  lu-  four  luimilc  proximal 
ones;  the  larj^er  ones  aie  hi;^li  and  sharp.  The  posterior  .series  is  a 
jitih^  loiijicr  and  contains  about  ei;.;lilecn,  similar,  but  somewhat  more 
slender  teeth.  A  tliin,  smooth  iiiartiin  extends  alonuoutside  bot  h  series. 
There  is  a  small  internal  denticle  at  the  front  edyc  of  the  resilial  pit. 
Pallia]  sinus  narrow,  considerably  intlcxed. 

Length,  S  mm. ;  licij;ht,  T)  mm. ;  thickness,  about  I  mm. :  from  beak  to 
anterior  end,  Ii  iiiiii. ;  posteri(U'  end.  ;"»  mm. 

One  live  specimen  was  dredj^cd  by  the  lUicln  at  station  l»i,  N.  lal. 
43°  3';  W.  lony.  7(P  4',  in  TA  fathoms,  1871. 

Proc.  N.  M.  vol.  vx 55 


[| 


IMAGE  EVALUATION 
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WEBSTf:?,  N.Y.  14580 

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mmmmim 


866 


riiOCEEDINGS  OF  THE  NATIONAL  MUSEUM. 


vor,.  XX 


YOLDIELLA  JEFFREYSI  (Hidalgo). 

(IMiitos  lAXXI.  fiir.n;  T.XXXIII,  W'A-"^-) 

Lida  laia  Jkffukys,  Ann.  Mag.  Nnt.  Hist.,  p.  i'M.  November,  ISTfi. 

Leda  jcffreysi  JkI'FRKys,  Troc.  Zoul.  Soc.  l.ondon,  p.  .579,  pi.  xi,\  r.  fig.  2,  .Imii', 

187!(. — Smith.  I'.A.,  Report  Voy.  Challenger.  Znul.  L.iniellibnuichiiita,  MM, 

p.2:M,18K-.. 
Not  Yoldiajeffreysi  Vkrrill,  Trans.  Conn.  Acail.,  VI.  ]i.  l!20,  1884. 

Shell  small,  ovate-ellipticiil,  soiiiewliat  thick  for  it.s  size,  rather  .swol- 
len, covered  with  a  glo.ssy,  iridescent,  brownish  yellow  epidermis.  Tlie 
posterior  end  is  eonsidei'ably  the  long;er,  somewhat  narrowed,  bluntly 
ronnded  without  any  distiiu't  rostrum.  Umbos  rather  prominent,  sonie- 
wliiit  swollen:  beaks  i)rominent,  curved  inward  and  backward.  Tlie 
antero-dorsal  margin  is  broadly  cotivex,  slopes  a  little  and  becomes 
continuous  with  the  rather  rejiularly  curved  outline  of  the  roundel 
anterior  end;  ventral  margin  is  broadly  and  regularly  curved  without 
any  distinct  ll(;xure;  the  ])osterior  eiul  is  obtusely  rounded  and  not 
delined  l)y  any  radial  lines  or  ridges,  with  the  doisal  margin  nearly 
straight  at  lirst,  usually  slightly  convex  in  the  middle,  and  slo|>iii^' 
gradually.  The  surface  beneath  the  epidermis  is  n<'arly  smooth  Init 
shows  more  or  less  distinct  lines  of  growth,  which  sometimes  have  the 
form  of  fine  parallel  striations.  The  hinge-plate  is  thickened  and 
rather  strong;  the  two  series  of  teeth  are  long  and  form  a  very  ol)tust^ 
angle  at  the  beak;  the  anterior  is  somewhat  the  shorter  and  uioie 
oblicpie  and  a  little  curved.  In  our  type  specimen  there  are  thirteen 
anterior  teeth  of  which  three  or  four  proximal  ones  are  very  small:  and 
fifteen  posterior  ones,  including  four  or  five  small  proximal  ones;  a 
somewhat  larger  specimen  has  iifteen  in  the  anterior  .series  and  eight- 
een in  the  ])osterior.  The  two  series  are  interrupted  beneath  the  beak 
by  a  small,  well-detined,  concave,  triangular  resilial  pit  supported  on 
the  inner  side  by  a  distinct  shelf  like  projection. 

Length  of  the  type-specimen,  5  mm.;  height,  'i.l  mm.  Length  of  the 
hirgest  specimen,  5.0  mm.;  height,  4,2  nnn. 

Six  sei)arate  A^alves,  at  three  stations,  between  N.  lat.  .37'^  38'  10", 
AV,  long.  7;P  10'  30",  and  X.  lat.  30^  42',  W,  long,  74'^  30',  m  727  to  1,423 
fathoms,  1884-1880. 

As  all  of  our  specimens  are  much  larger  than  the  measurements 
given  by  Jeffreys,  they  are  referred  to  V.jrffni/si  (Hidalgo)  with  soiut* 
doubt,  although  they  appear  to  agree  well  with  Jelfreys's  ligureot'tluit 
species  in  form  and  in  the  character  of  the  hinge. 

YOLDIELLA   LENTICULA  (MoUer)  variety  AMELIA,  new. 

(riatos  LXXX,  tig.  'J;  LXXXI,  fig.  I.) 

Xitcnla  Icufiriila  M<)LT,f,k.  Ind.  Moll.  Gid-nl..  i».  17,  1842. 

Voldia  ahi/KHieohi  Tohki.l,  Spitzliovfjens  Molliiflkfauna,  ]>.  14!t,  jtl.  i,  111:1.  t,<i-7'. 

18.")9. 
J'orlJandia  lenlieitht  fi,  ().  Sahs.  Molluacji  I?ejj.  Arcticin  Norvogiie,  p.  ;*!'■  I'l-  '. 

n«s.  10,  a-h,  1878. 
J.ida  leniivuhi  .Ikki'Rkvs,  I'loc.  Zoc'il.  Sot;.,  London,  p.  577,  June,  1879. 


122 


NO.  1139. 


DEEP-WATER  MOLLUSC  A— VEIUi  ILL  AND  BUSH. 


IJ- 


867 


Our  speciineiis,  which  are  worn  aiul  inii)erfect,  referred  to  this  north- 
ern species,  (litter  somewhat  from  the  typical  specimens  from  Sjutz- 
bergen,  received  from  Doctor  P'riele.  They  are  relatively  shorter, 
higher,  and  somewhat  less  swollen,  with  a  thicker  and  heavier  shell. 
The  posterior  end  is  less  produced  and  less  tapered,  so  that  it  has  a 
more  ovate  form.  The  hinge-teeth  are  stouter;  tlu^  posterior  series  is 
shorter  but  contains  the  same  number  of  teeth  in  specimens  of  similar 
si/e.  With  the  amount  of  material  that  we  have  for  examination,  the 
differences,  however,  seem  hardly  sutlicient  to  warrant  the  8e])aration 
of  our  shells  as  a  distinct  species.  We  tlierefore  propose  the  varietal 
name  (diihlia  for  our  specimens. 

A  few  separate  valves,  at  two  stations,  north  of  Capo  (Jod,  in  110  to 
122  fathoms,  1878-70. 


YOLDIELLA  FRATERNA,  new  species. 
(Plates  LXXX,  (ij:.  5;  LXXXIl,  lijj.  8.) 

YoUlia  frifjida  Verkii.i..  'I'rans.  Conn.  Acad..  VI,  ii.  279,  1884;  P^xpl.  Alhntrosn, 
IJeport  I'.  S.  Com.  Fish  and  Fisheries  for  188H,  p.  .576,  1885  (in  part). 

Shell  small,  thin,  delicate,  irregularly  ellii)tical  in  form,  the  posterior 
end  being  a  little  tlie  longer,  unusually  broad,  and  slightly  prodnced 
above,  but  not  distinctly  angulatcd.  with  a  glossy,  iridescent,  yellow- 
ish green  epidermis.  Umbos  a  little  swollen  ;  the  beaks  small,  scarcely 
l)rominent,  and  subcentral.  The  anterior  end  is  broad,  a  little  produced 
in  the  middle,  and  obtusely  rounded;  the  diusal  margin  is  nearly 
horizontal  in  the  region  of  the  teeth;  distally,  sharp,  and  convex,  then 
sloping  rapidly  to  the  middle  of  the  anterior  end.  The  ventral  margin 
is  broadly  rounded,  expanding  a  little  posteriorly  and  then  a.scending 
pretty  rai>idly  to  the  posterior  tip  which  is  obtusely  rounded  superi- 
orly; ])ostero  dorsal  margin  slightly  convex  and  nearly  horizontal  for 
the  greater  part  of  its  length.  The  surface  beneath  the  epidermis  is 
marked  only  by  faint  lines  of  growth.  The  hinge-margin  is  thin, 
rather  delicate,  with  the  two  .series  of  teeth  of  nearly  ecpial  length  and 
diverging  from  the  beaks  at  a  broad  angle;  each  .series  contains  about 
ten  rather  thin  and  delicate  teeth,  of  which  the  one  or  two  proximal 
ones  are  very  small  and  rather  indistiiu^t.  Beneath  the  beak  the 
margin  is  attennated  and  interrupted  by  a  small,  oblong  lesilium  which 
occupies  the  entire  thickness  of  the  margin  and  a  sligiit  notch  in  the 
beak.  The  pallial  sinus  is  relatively  rather  large  ami  deep,  but  in 
most  specimens  is  invisible. 

Length  of  the  tigured  specimen,  4  mm.;  height,  about  2.1  mm. 

A  comparatively  small  number  of  specimens,  at  abont  twenty  sta- 
tions, between  N.  hit.  47°  40',  W,  long.  47'^  ;$.")'  .'{()",  and  N.  lat.  .'{7"  8', 
W.  long.  74"  3.3',  in  m  to  1,008  fathoms,  187;{-188«>. 

This  is  i  deep-water  form  formerly  identified  by  us  as  YoUlia  fritjida 
Torell. 


II 


J 


S6S 


j'J!()ri:i:j)j\<;s  or  the  xatioxal  mvsf.im. 


Vdl,.  XX. 


YOLDIELLA  CURTA,  new  species. 

J'lair  XCVII,   liu-.IS.) 

rintscolKn  (irahim.' )  \y.\inii.\.,  I  raiifi.  (Oiin.  Aiiid..  \  1,  ]•.:.','>(),  lj<,st ;  Kxpl.  .(/,'„(//•,/«■<. 
Jfi'liort  r.  S.  Coin.  I'isli  Mini  l"i>liiti('s  lur  \SH',<.  \k  .")7i>.  I."^s5  (not  S<\Lriioii/;i  i. 

Shell  sinnll,  .><h(n-r ovato,  ratluT  swollen  in  tiio  middle,  with  ratliei- 
ju'oniiiuMit  ninhos,  s(»MU'\vli;ir  ine<|nil;it('ral.  the  po.sterior  end  tlx^  lonucr 
and  sli};litly  produced.  I'.eaks  .small,  inciiiN cd,  with  a  slij^lit  i)0,sieri()i' 
twifcst  and  a  little  .separated  from  the  mariiin.  The  dnr.sal  mar<;iii  is 
nearly  straight  medially,  both  before  and  behind  the  beaks,  anteriorly 
it  merj;es  ^ladnally  into  the  broadly  rounded  anterior  end,  which 
usually  has  an  ol)seure,  blunt  angulation  in  the  middle;  ventral  nnir 
yin  broadly  and  evenly-  rounded,  nieruin;^'  iiradiially  into  the  more 
abrui)t  cur\e  of  the  posti'rior  eml  whieh  is  a  little  tapered,  but  obtusely 
rounded  without  any  disl inet  rostrum  or  anj;ulal ion  :  the  ])ostero-do!sal 
mary,iu  is  a  little  ])rominent.  pinched  u})  and  (;onvex,  with  a  considera- 
ble slope,  so  that  the  ti]*  of  the  shell  is  but  little  above  the  ndddle. 
The  surface  is  polished  and  somewhat  iridesi-ent,  marked  only  by  line, 
irreiiular  lines  of  growth.  Mpidernds  i»ale  greenish  or  browiush  yellow. 
There  is  a  lelatively  very  large  resilium.  ai)pearing  yoke-shaped  or  wide 
W-shaped  in  the  separated  valves,  and  co\ering'  a  relati\ely  Ion::. 
e(h'ntulous  spa«'e  beneath  the  beaks.  The  teeth  are  compressed, 
oblique,  imperfectly  V-shaped,  especially  i)osteriorly,  and  but  slightly 
elevated.  There  are  six  or  seven  in  the  posterior  series,  of  which  the 
])r()\imal  ones  are  rather  indistinct ;  ami  four  distinct  and  two  or  three 
indistinct  ones  in  the  anterior  series.  In  a  dorsal  view  live  are  visible 
aboM'  the  margin  behind  the  beak  ijud  four  before,  i'hey  are  not  very 
long  and  rather  blunt,  with  the  distal  side  sloping  and  the  side  next 
the  beak  a  little  incur\e(l  and  concave. 

Length,  2.<I  mm.:  lieight,  l.S  mm.;  thickness,  about  1  mm. 

A  few  live  specimens,  at  three  stations,  between  N.  hit. -H  11' .!()", 
AV.  long,  dtp  12'  20".  and  N.lat.  .',!)  ;5S',  W.long.  70  21".  in  l!M»  to  l.L'lKl 
fathoms,  1S83-1S80. 

This  species  somewhat  resendjles  V.  frhjida  in  form,  but  it  is  rela- 
tively shorter,  higher  and  less  distinctly  rostrated.  Its  hinge  is  also 
<iuite  dilferent.  The  [iresent  sjw  -ies  is  peculiar  in  ha\ing  fewei'  and 
blunter  teeth  and  a  much  largt ;  resilium  than  most  of  the  related 
sj)ccies. 

YOLDIELLA  PACHIA,  new  species. 

Slu>ll  very  broad,  o\al.  consideiably  swollen  in  the  middle,  with  the 
length  and  height  m-arly  eipnil;  nnd)os  rathei' prominent.  The  poste- 
rior end  is  narrowed  and  slightly  produced,  but  n(»t  defined  by  any 
groove  or  cariimtion.  '^^riie  dorsal  nmrgin  is  Ncry  obtusely  angidated, 
anteriorly  it  is  convex  and  slopes  ])retty  rapidly  to  the  broadly  antl 
evenly  roundetl  anterior  end;  posteriorly  it  is  nearly  straight  at  (irst, 
then  sloi>es  gradiuUly  to  the  posterior  end.    The  ventral  margin  is  \erj' 


i 


NO.  unit. 


i>i:i:i'-u  ATi.i;  mdiiisc  t  ~Ji:i:i;ii.i.  .im>  i;rsn. 


SCO 


1  tin;  idly  rniiiidi  d  and  sli^litly  prod  need  in  tlu'  middle;  it  jnins  lli(>  ciii'vo 
(tf  the  jtostcrior  end  willi  ;i  scarcely  perceittilile  incnr\  atiire  in  sdiiio 
speeiinens:  the  jKisterior  end  is  ctlttnsely  I'onnded  and  sitnated  about 
liiidheiyht  (tf  the  shell.  The  ditrsal  eddies  ol'  the  vahc  are  thin  ai  it  a 
little  |tinched  up,  but  there  is  no  distinct  liinnle  and  oidy  a  very  nar- 
row liin-anieiital  I'uirow.  The  epidermis  is  polished  ami  somewhat  iri- 
descent. a:id  marked  with  line,  somewhat  irregular  lines  ot'  yi'owth,  in 
some  places  showin^-  faint,  ndcioscopie.  I'adial  striation:..  (\tlor  oT  the 
dead  \al\es.  Inow  nis'i  yellow.  II iii^'e  plat«'  stroni;.  narr<iw  near  the 
beak,  wide  di.vtally.  siron^ly  angled,  wiih  tin-  (tnter  edue  naked  and 
rather  broad.  es])eciall.\'  anlei'orly.  Teeth  laruc  and  promiiiont  <lis- 
tally.  with  about  three  small  jtroximal  (tnes:  about  eiyht  in  the  ante 
rior  and  ten  in  the  jiosterior  series.  The  resilial  pit  is  a  distinct, 
triaiiiiular  tbssetle.  or  ('iKtinlrophore.  on  the  face  of  the  inaruin.  eover- 
ini;  its  whole  breadth,  and  bordered  internally  by  a  thickened  edi^e 
whi<'h  causes  an  e\cur\ature  of  tiie  margin.  There  is  a  distinct  iiiar- 
<;inal  external  ligament  and  furrow,  or  esciittdieon. 

Len<ith.  4.(1  mm.:  heifild,  I.S  mm. 

Three  sejtarate  vahcs,  ani<tn,i;'  l''oraiiiiiiifera.  at  stati(tn  I'.'kSr),  N,  lat. 
28^  "(1,  W.  loii-i-.  SS     IS  ,  in  7;>(»  fatli<ims,  ISS.1. 

In  outline  this  species  resembles  Y.  cinfd, hut  dilVers  in  its  wider  ami 
stouter  hin^i'  ]tlate.  more  numerous  and  imtre  hij^hly  developed  teeth, 
and  especially  in  the  form  and  structuie  (tf  the  resilial  pit. 

YOLDIELLA   INCONSPICUA.  new  species. 


d'l.iti'  i.XMX.  fiu's.  :\.  r..) 

Shell  small,  thin,  delicate,  citmpresst'd,  suii<t\ate:  jxtsterior  end  a  lit- 
tle produced  and  narrowed  medially.  Surface  lust  rctus  and  iridescent. 
I'mlKts  scarcely  pntmineiit ;  beaks  small,  itrttject  inu'  but  little  above  the 
ditrsal  inariiin.  The  antero-dorsal  mar.inin  is  slightly  convex  and  nearly 
hori/.oiital  at  tirsl.  then  sIo])es  .uradually  t(t  the  e\enly  rounded  anterior 
end;  vt'iitral  mar,uin  broadly  ntunded,  slij^'htly  swollen  jtosteriorly, 
aseendiiifi'  more  rapidly  t(t  the  narrow  and  bluntly  rounded  posterior 
end;  jxtstero-dorsal  maruin  m'urly  straijiht  toward  the  beak,  then 
sliiilitly  convex  and  slopiui;-  very  j>radually.  The  surface  is  covered 
with  line,  pretty  re<iular.  concent rie  <;ro(t\es  iind  laised  lines,  visible 
only  under  the  niieroscope.  J"4  ideriuis  thin,  shininj;.  iridescent.  j>reeii- 
ish  yellow.  The  hin.uc-marji'in  is  tlun  and  delicate,  nearly  straiji'ht;  the 
two  series  of  teeth  form  a  very  (tbtiise  aiijjle  at  the  beaks  ;ind  are 
interrupted,  for  a  e(tnsider;ible  s|)ace,  by  the  resilium  which  does  not  lie 
in  a  distinct  pit.  The  ligament  shows  as  a  delicate,  contiiuious  mar- 
;.:iiial  line,  both  in  front  of  and  behind  the  beaks.  The  teeth  are  small, 
obli(|ue.  V-shaped.  In  the  anterior  series  there  are  about  six  <listiii('t 
ones  with  one  or  two  minute  i»roxinial  ones:  in  the  posterior,  about 
seven  distinct  ones  with  one  or  two  riidiiiientar\  ones  near  the  beak. 


870 


pn()ci:i: DISCS  nr  the  xattoxal  ^^rsEf'^f. 


VOL.  XX. 


Tbe  pallial  sinus  is  latlier  wide  iuul  moderately  dee]),  but  is  invisildc- 
in  most  si)eeimens. 
Len<;:th  of  the  laif^est  specimen,  .^«1  mm.;  lieiyht,  U.3  mm, 
A  number  of  specimens,  at  about  lif'teen  stations,  between  X.  lat. 
42'  ;W,  W.  lonji.  (i!>^  5S.r>',  and  X.  lat.  .{"i^  IL"  W,  W.  lonji.  71  '  .57'  15", 
in  100  to  70a  fathoms,  1878-1 8S(). 

This  species  is  distinguished  from  YoldidUt  fr'ujUUi,  and  most  of  the 
other  snuill  sj)ecies  which  it  resend)les,  by  its  narrower,  or  lower,  and 
more  comi)ressed  form,  more  delicate  shell,  straij;hter  dorsal  niarj,Mn, 
and  the  more  central  prolonjiation  of  the  posterior  end.  It  is  appar- 
ently more  nearly  i-elated  to  the  smalh'r  sjn'cies,  )'.  miniiscKla,  than 
to  any  other.  The  latter  has  a  smaller,  shorter,  and  nur-e  swollen 
shell,  nu)re  conv'ex  ventrally,  with  the  hinye  niaryin  somewhat  nioie 
anyulated. 


YOLDIELLA  MINUSCULA,  new  species. 

(I'lat.'  I. XX IX,  li-iH.  L',  7.) 

Yohlia  jeffrcijm   Vkkimi.i,,  Trans.    Coiiii.    Acad.,   VI,  pp.   L'L>9,    127!t,    1S8I ;    E\))l. 
AlhatrosH.  Kcixnt  IT.  S.  Com.  Fi.sli  inid  I'Mshciics  for  1><S;{,  p.  57t>,  lf<S.-i. 

Shell  nunute,  broad-ovate,  (covered  with  microscopic,  i)retty  rej>iil:ir 
concentric  striatious,  with  a  very  lustrous,  souicwhat  iridescent,  yel 
lowish  epidermis.  The  two  ends  are  nearly  ei[ual  in  length;  the 
posterior  soinewluit  narrowed  and  obtuse  at  the  end,  the  anterior  well- 
rounded.  The  umbos  are  not  prominent  and  the  beaks  are  very  small 
and  project  but  slijjhtly  above  the  uuirgin.  The  antero-dorsal  unujiin  is 
slightly  convex  at  lirst,  and  nearly  horizontal,  and  passes  j;radiially 
into  the  curve  of  the  anterior  end;  ventral  margin  is  broad  and  nearly 
uniformly  convex;  the  posterior  end  is  a  little  produced  in  the  niiddlc 
and  forms  there  a  slight  obtuse  angle;  the  i)ostero-dorsal  margin  is  a 
little  convex  and  nearly  horizontal  at  first  and  then  sloi)es  rather 
rai>idly  to  the  tip.  The  hinge-margin  is  thiji  and  delicate;  the  two 
series  of  teeth  lie  nearly  in  a  straight  line  but  the  anterior  one  is  a 
little  obli<iue,  so  that  they  form  a  very  wide  anp-le  at  the  beaks  where 
the  resilium  entirely  interrupts  the  hinge-nnirgin  forming  a  wMde  notch 
without  any  detinite  pit  or  shelf;  the  teeth  are  small,  very  obliijue.  and 
only  slightly  i)rominent;  there  are  only  about  live  in  the  anterior  and 
six  in  the  posterior  series. 

Length,  about  2.3  mm.;  height,  about  1.5  mm. 

Oidy  a  few  specimens,  at  four  stations,  between  X.  lat  41°  53',  W. 
long.  05°  35',  and  X.  lat.  38°  27',  W.  long.  73°  2',  in  705  to  1,2!tO 
fathoms,  1883-1885. 

This  very  minute  species  may,  with  a  larger  series,  prove  to  be  tlie 
young  of  some  of  the  x)receding  species. 


NO.  1139. 


l)EEP-]VATKli  MOLIASCA—VlAiUlLL  AM)  lllsll. 


871 


YOLDIELLA  SUBEQUILATERA  (Jeffreys). 

Lvda  siib<<ii(il(itn(t  .li:i  1'1u:ys.   I'loc.    YauA.   Soc..   Ldiiduii.  p.  ."iTi'.  ]>\.   \i.vi.    ti<^. 

M,   IST'.i. 
)i>lili<i  .s(ihf(iiiil(ilci(i  >'i;i:i;ii.i.,  Ti-.tiif..  Cuiiii.  Aiad.,  \  1,  pp.  lil'ii.  I'Tl',  l^M  vi"  I'aiti; 

Hxpl.  AIIkiIids.s.   h'cpurt  r.  S.  ('iim.  Fish  ami  I'lsherirs  lor  iNS;!,  p.  .'iTtl.  IS'^S 

(in  part). 
I.fdii  siiheiiiiihilrnt  1>.\I.I.,  Hull.  Mils.  Conip.  /.oiil..  MI,  p.  L'.M',  ISSt;, 
loWia  xuluiiuilalcni  l».\i,i,.  I'.iill.  l'.  S.  Nat.  Miis.,  No.  liT.  ji.  II.  ISSii. 

Several  live  .spccinu'iis  (No.  .■^5204),  from  station  'JOM.  N.  hit.  .'is^  .~»;j', 
W.  long.  (>!»o  U3'30",  in  1,7;U  tatlioins,  1S8;{,  have  been  relVrred  to  tlii.^^ 
species.  Although  younger  or  sni.iller  tlian  .IctVicys'.s  type,  they  auree 
very  clo.sely  with  his  tijiiire.s  and  (U'scription.  The  shell  is  very  small, 
very  thin  ami  transparent,  polished,  lustrous,  but  scarcely  iridescent 
and  marked  only  by  micr()scoi)ic  lines  of  <irowtli.  It  is  rather  com- 
pressed, nearly  ellijitical  in  form,  with  the  beaks  ])rominciit  above  the 
dorsal  maryin  and  turned  almost  directly  inward.  I'oth  ends  are 
obtusely  rounded  and  nearly  equal  in  len.i:th.  so  that  it  is  impossible  to 
deternune  which  is  anterior  and  which  is  posterior  by  the  external 
characters;  one  end,  supi)osed  to  be  the  anterior,  is  however  sli^litly 
broader  than  the  other.  There  is  mi  distinct  liuament  visible  externally. 
The  hiuye  i)late  is  nearly  straight,  the  two  series  of  teeth  forminji-  but  a 
slight  angle.     Interior  not  seen. 

Our  specimens  measure  from    I.."*  to  -.."•  mm.  in  length.     South  to 
Grenada,  in  1)2  fathoms. — Dall. 

YOLDIELLA  EXPANSA  (Jeffreys). 

(Plato  \('\Il,  li.i,'.  ;{.) 

Lrda  cxpatisa  .Ikkfki'.ys,  .\iin.  Mag.  Nat.  Hist..  ]>.  ISl,  NoMiulnr.   ISTO;   Proc 

Zoi'll.  .*<u(r.,  London.  ]i.  .'iSO.  ])1.  \i,vi.  lig.  1.  .Inn".   ISTt). 
Not  Volilia  iJiKDiKd  \  v:\iHiLi.,  Trims,  ("onn.  Acad.,  \\,  ]^.'2'iiKlSSi. 

Shell  oblong-ovate,  nearly  eipiilateral,  with  the  posterior  end  a 
little  more  broadly  rounded  than  the  anterior:  both  regularly  obtu.se. 
Both  dorsal  margins  are  slightly  convex  and  slope  but  little.  The 
hinge-plate  is  moderately  wide,  gently  arched,  witli  sharj)  doisal 
margins,  and  is  completely  interrupted  in  the  middle  by  a  (U'cp, 
angular  notch  for  the  resilium  which  is  rather  large  and  dark  and  is 
attached  to  the  inner  surface  of  the  shell  below  the  beak.  In  the  right 
valve,  there  are  uineposteriorteeth,includingoneor  two  very  small  ])rox- 
inuil  ones,  separated  from  the  margin  by  a  rather  wide,  smooth  space; 
those  in  the  middle  of  the  series  are  long,  wit  ii  tapered,  acute  tips  which 
are  bent  upward  aiul  toward  the  beaks,  and  at  base  aie  V-shaped. 
In  the  anterior  series,  which  is  a  little  the  longer,  there  are  ten  teeth, 
including  two  or  three  very  small,  proximal  ones;  the  larger  ones  are 
nearly  erect  with  the  tips  less  inclined  than  those  in  the  i»osterior  scries; 
they  are  separated  from  the  margin  by  a  plain  space  about  as  wide  as 


<  I 

: 


t 


872 


n;(>(i:i.])i\iis  m-  rni:  y.irioy  tr  .vr.s/.TU. 


vnr..  XX. 


the  tcctli.  Til  tlui  left  valvo,  tlirro  iirc  clcvoii  iiiitoiior  :iii(l  nine  jm),s- 
terior  ttM'tli.  Tlie  siirfiu^o  of  tlic  shell  is  dull  ycllowisli  j;rc<ii,  only 
slightly  iridescoiit.  iiiul  covt'icd  with  irri'^uhir  lines  of  {"fiowth  whicli.in 
sonu'  pliices.  form  irrej-ular  raised  lines.  The  iiiubos  are  but  liirle 
proiniiiont:  tlie  beaks  are  small  and  turn  baekward. 

Leii^i'lh,  .■'».<•  mm.;  lieiyhl,  2,r>  mm. 

One  spei'imeu  (Xo.  7S;?(;;5),  station  2(107,  X.  lat.  47'^  !(»',  W.  Ion--.  17 
3.'.'  :',()",  in  2»»(!  fathoms,  ISSC. 

This  s](e<'ies  is  pt'ciiliar  in  its  nearly  equilat(Mal.  elliptical  form,  with 
the  dorsal  marj-ins  ficntly  eoiivex  and  only  slightly  sloping- botli  sides  of 
tlie  beaks,  and  especially  in  its  large  resilial  notch  which  cuts  entirely 
thnm^h  the  liinge-plate.  Tt  aj^rees  pretty  closely  with  .lelfrey^"  lypi'. 
but  the  latter  was  much  smaller  and  his  (igures  ami  diaj^nosis  ar«'  too 
imju'rfect  to  make  its  identity  certain. 

YOLDIELLA    FRIGIDA  (Torell). 

(I'ImIc  1,XXI\.  liu.  I.) 

Yohlia  frhjithi  Vi",ni:ii,r., 'I'raiis.  Conn.  Acad..  \.  ]i.  T)?;*.  ]>1.  M.i\ .  fi<j.  2,  ISSH;  \  I. 
p.  L'7!>,  18SI  (i7i  part);  F:<|il.  .Ulxilroxs,  ]ic]>i>Tt  I'.  8.  Com.  Fi.sli  and  Fishrrics 
for  1SS3.  ]). ."(!,  1S8.">  (in  i)art). 

A  very  few  specimens,  at  about  ten  stations,  between  X^.  hit.  1">  .'. . 
W.  long.  H)  ll'.'JO".  and  X.  lat.  .'«V^  :>;!' ;?(>",  W.  long.  71°  I.'IT.O",  in  ss 
to  :U2  fathom.s,  1874-18S1. 


I 


NO.  1 1 


The 


YOLDIELLA    DISSIMILIS.  new  species. 

(Plates  LXXVIIT.  iiii'.  S;  LXXXII,  )!«.  7.) 

Yoldia  expanm  ^'KUlaLr.,  Trans,  ('onii.  .Vcad.,  \I.  p.  I'TH.  1S81 ;  F.xpl.  AJhatmss,  i;,.. 
l)ort  U.  S.  Com.  Fish  and  Fisheries  Wiv  IS8'i,  ])..'i7ll,  1S8.")  (not  of  .TeflVcy.si. 

Sbell  small,  oblong  ovate,  nearly  equilateral,  with  the  anterior  end 
the  broader  .and  bluntly  rounded,  the  jiostorior  end  somewli.it  narrowed 
medially  and  bluntly  rounded,  -witlioutany  distinct  angulation.  I'mbos 
somewhat  prominent;  beaks  small  and  strongly  incurved.  Surface 
straw-colored,  not  lustrous,  covered  with  line  concentric  lines.  Aiitcro- 
dorsal  margin  but  little  curved,  sloping  very  gradually  to  the  anterior 
end  which  is  curved  nearly  in  the  arc  of  .i  circle;  ventral  margin  very 
broadly  rounded  with  a  very  slight  obtuse  angulation  behind  the  mid- 
dle: postero-diU'sal  margin  slightly  excavated  Just  behind  the  beaks, 
then  sloping  very  gr.adually  to  the  obtuse  posterior  end.  The  hinge 
margin  is  moderately  stout;  the  two  portions  form  a  very  wide  angle 
at  the  beak  with  the  anterior,  which  faces  obliquely  downward,  cousid- 
er.ibly  the  more  arched.  In  the  center  the  margin  becomes  very  thin 
and  is  interrui)ted  by  the  resilium  which  occujiies  a  deep  notch  and  an 
internal  shelf  of  considerable  size,  situated  far  back  and  directed  down 
ward  to  such  an  extent  that  it  is  only  partially  visible  in  a  direct  front 
view;  there  are  about  eleven  or  twelve  anterior,  and  eight  to  ten  jiostc- 


Nc.  ll:t!). 


/ > !■: i: I'-ii'.i  Ti: /;  .1/ oi.i.isic.t-i Vv /; A' / /. /.  ,t sit  n i  sir. 


873 


I 


ii(»r  acuti',  (Miivt'd,  V  sliiipcd  trctli;  iit  the  inoxiiiinl  end  of  tlic  posleriitr 
s(Mios,  in  the  left  Viilvo,  thorc  is  an  oldoiiji',  inondiitMit,  tootli  IMu'  inocess, 
niucli  laij^er  than  tlM>  adjacent  teiitli.  Tlircc  or  I'oiii  of  tlicdisial  ttctli. 
on  cacli  side,  are  decidedly  Iar<i'c,  prominent  and  acute  witli  the  tip 
curved  outward,  hut  the  si/.e  (U'creases  rejiuhirly  towai'd  thi'  center. 
Tiiere  is  a  well  (h'velo]»cd  daric  li.uanient.  visihh' externally.  l>otli  hrlore 
and  hehiiid  the  beaks.  The  surlace  is  coxered  hy  i-elatividy  rather 
hirj;e,  distant,  concentiic  lidj^cs  and  liiirows,  easily  visihle  under  a  lens, 
which  are  e\ery\\licre  covei('<l  hy  very  r«'jinlar  niicr(»sc()iiic  lines  and 
•grooves  of  about  eqiuil  width. 

l-eniith  of  the  laruest  valv«'.  4.L.'.">  mm.;  hei.uht,  L'.s  mm. 

A  lew  specimens,  at  four  stations,  between  X.  hit.  3!)  4!t'.  W .  lonj;.  »iS'' 
L\S'  ;iO",  and  >'.  lat.  3(Jo  47',  W.  lon^-.  73^ «.»'  30",  in  l,i:.l  to  l,(;s.".  fathoms, 
l.SS3-18S(). 

This  species  is  remarkable  for  its  oblonp-ovate  form  ami  very  regular 
concentric  scnli)ture,  consistinji'  of  fine  ridjjes  and  furrows  which  are  in 
turn  evei-ywlierc  covered  with  regular  nncr(»sc.opic  lines.  'I'liis  s]»ecies 
was  at  lirst  thought  to  be  Y.  r.iiKtiisn  (.fellreys)  which  it  reseiid)les  in 
form,  but  additional  specimens  and  more  careful  study  show  that  tlic^ 
spe<aes  are  very  distinct.  In  Y.<'.>'iniii.sn  the  hinge-margin  is  much 
straighter,  tiie  teeth  fewer  and  diiterent  in  form,  the  resilial  j>it  very 
different,  the  two  ends  of  the  shell  more  nearly  eipial.  and  the  scul])- 
ture  (pute  different. 

Our  specnes  differs  considerably  from  the  typical  forms  of  Vohlitlla 
in  having  a  more  obh>ng  form  with  both  ends  evenly  rounded,  a  well- 
developed  ligament,  and  a  nM)re  evident  resilial  fossette  or  chondro- 
l)hore  which,  however,  is  situated  decidedly  below  the  hinge  plate. 
The  existence  of  a  peculiar  tooth-like  process  adjacent  to  the  resilial 
notch  would  be  a  (dsaracter  of  considerable  imi)ortauce  were  it  con- 
stant, but  the  s])eciinens  show  great  variatiou  in  its  development :  in 
sonu%  it  is  even  almost  abortive.  These  distinctive  characters,  although 
important,  seem  hardly  worthy  of  generic  <listinction. 


MALLETIA   Desmoulins,  1832  (restricted). 
MnUet'ut  \'i;i;kii.i.  and  in'sn.  Amcr.  .Ii)urii.  Sci..  HI.  i»]i. .")(!,  dlJ,  .lamiary,  lSi)7. 

7)/jf>c. — Mdllctid  rliilensis  Desmoulins. 

We  have  restricted  this  group  to  those  species  having  a  nearly 
smooth,  somewhat  compressed,  oblong  or  elliptical  shell,  blunt  pos- 
teriorly, without  any  definite  rostrum  or  carination.  The  carinated 
and  rostrated  species  that  have  been  placed  in  it  will  thus  be  referred 
to  XciJo  IT.  and  A.  Adams.  The  resilium  is  wanting,  or  else  represented 
by  a  special  part  of  the  ligament,  external  to  the  teeth.  The  ligament 
is  well  developed  and  prominent.  The  sii)hon  tubes  are  long  and 
united  nearly  to  the  tips. 


874 


Pi{ori:i:inxt!s  of  the  s.itio\m.  Mrsi:j\T. 


vol..  XX. 


NO.  1 1 


The  subgenus  rscudiimnllrtio,  i)r()i»()sod  by  I'ischer  for  .1/.  ohtxsa,  wjis 
based  on  an  erroneous  description  ol"  the  siphon  tubes. 

The  Ibllowinf;  arc  soiiui  of  the  known  species: 

.)/.  cliilftiNis  Dcsnioiilins,  \'ali)araiso  (Type);  M.  ohtnsa  (Sars)  Miireh, 
from  oir  Cape.  Fear,  North  ('arolina,  northwanl;  M.  polita  Verrill  and 
l5ush,ofV  Delaware  Hay;  M.  ahi/ssDruin  \'crrill  aiul  Hush,  oiV  ('hesa 
pealve  Hay;  .1/.  cunvdtn  JelVreys,  Xortii  Atlantic;  .1/.  jKillithi  Sinitii. 
]\rid  South  Atlantic;  ^1/.  <nnn(((iia  Smith  and  M.  tlunkcri  Smith. 
I'acitic;  and  .1/.  hclhtrdii  Se;j;uen/a,  fossil. 

MALLETIA  OBTUSA  (M.  Sars)  Morch. 
(I'liitc  .XCVII.  lijjc.  I.) 

Yohiiii  obtiisn  G.  o.  S.xHs,  I>oiiiarl<al>lt'  I'mm.-*  <>f  ATiiiiiiil  liifc,  p.  'Jli,  pi.  ni.  tiii.s. 

lti-'_'0,  ISTL'. 
MaUitUt  ohtitKii  (i.  ().  Saw.-;,  .Mollii.sra.  Ik'fi.  Arctici'  NOrvej^ia-,  ]».  41,pl.  11).  )i>rs. 

;{,«-/<.  187S. — .ll'.lKUKV.s,   I'loc.  ZoiU.  Soc.   I,.»ii(l()li.  ]).  r>S(;,  Juilt).   ISyit.  —  \'|.;i;- 

KiM.,  I'raiis.  ('.mil.  Acad.,  \I,  i)p.  l-'l'd.  liSO,  ISSI;  V.\\i\.  .tlhatioHx,  l.'.'iiort  T.  s. 

Com.  Fish  and   I'i.slnMios  Ibr  1SS;{.  p.  ."»7(i.  18S,'). — SMnii.  K.  A.,  K't')><)it  \'(i\ . 

Chathiiiio;   '/.olW.   Laiindlilpraiicliiala.  XIII.  y.  21,".,  ISH-).— l).\i,i„  liiill.  l".  S. 

Nat.  .Mils.,  .No.  :{?,  p.  4t;,  ISS'.t.— lUsii.  IJiil.  Miis.  Coiiip.  Zo.'d.,  -Will,  i).L':;i. 

18!W. — l.oc.viti),  C'aiiii)a,i;iio  dii    (andan,  .Viiiialcs  do  rUuivcrsitc^  dc    l.yon, 

]>.  I'OL',  IStMI.— N'kkuii.i.  and  lU  >ii.  Aiiicr.  .Imiiii.  Sci.,  111.  ]i.  57,  tig.  it,  18it7. 

The  soft  ])arts  of  .several  specimens,  rather  ])oorly  preserved  in  alco- 
hol, have  been  exandned.  They  have  a  large  foot  with  an  ovate  disk 
l>ointed  in  front  and  minutely  crenulated.  The  8i])hon  tube  is  ratliei' 
long  and  slender,  in  some  cases  uot  entirely  retracted  within  the  shell; 
it  appears  to  contain  both  the  branchial  and  anal  tubes  which  arc 
closely  united  (juite  to  the  simple  tips;  at  the  inner  base,  there  is  a 
well-marked  siphonal  septum.  The  gills  are  small,  elongated,  pointed 
jwsteriorly,  and  have  the  structure  usual  in  the  family.  The  pali)i  arc 
rattier  large,  elongated,  with  revolute  nmrgins;  the  ])alpal  tentacle  i.s 
very  long  and  slender,  and  in  the  contracrted  state  variously  bent  witli 
the  edge  nuich  convoluted.  No  pidlial  tentacle  was  found  at  the  base 
of  the  siphon. 

In  our  collection  there  is  a  large  series  of  this  species;  the  form  is 
pretty  constant  and  in  ne;irly  all  cases  is  more  oblong  than  the  iuiro- 
peau  species,  as  figured  by  (I.  O.  Sars.  The  snuill  specimens  are  com 
])ressed  while  the  large  ones  are  a  little  swollen.  The  umbos  arc 
small,  but  slightly  elevated;  the  beaks  are  very  small,  turned  directly 
inward,  and  are  almost  in  contact  with  the  margin,  so  that  they  arc 
generally  worn  away  in  the  larger  specimens.  Directly  uiuler,  and 
l)artly  in  the  beaks,  and  also  cutting  more  or  less  into  the  thickness  of 
the  external  side  of  the  hinge-margin,  there  is  a  small  notch,  or  shallow 
excavation,  which  is  occupied  by  a  special  portion  of  the  ligaiiiri.l 
that  probably  represents  a  remnant  of  a  degenerated  re.siliuni.  T!u' 
true  ligament  is  well  developed  and  pronuneut  for  about  one-hall  I'a- 
length  of  the  hinge-margin,  then  becomes  abruptly  thinner  and  luu- 


row 

itse 

teet 

in  tl 

rior, 

thei' 

mar; 

insi( 

thi> 

the 

direi 

strai 

cui 

Tlu 

post 

e.\])i 

mar; 

sinu 

shel 

exte 

with 


■■■i 


N(i.  ii;ii). 


ni:i:r-i\  trii,'  Moi.i.rsc  \~~]  ir.uu.i.  am,  hi  sii. 


sTf) 


I 


t 


rower;  its  jjroovc  is  narrow  aixi  iiicuiisiticuoiis,  'I'lio  liiiiuo  inarjiin 
itscll'  is  ratlier  tliiii  and  brars  very  numerous,  erect,  V  siiaped.  acute 
teetii  which  number,  in  tlie  iar^a;  specinu-ns,  aboutsixteen  or  seventeen 
in  the  anterior  series  and  about  thirty  two  or  tiiirty  three  in  the  poste- 
rior, inehidinj,' a  nuinbei'  of  small  proximal  oiu's;  beneath  tlie  beaks 
there  is  a  sni(K)th,  edentulous  space,  often  a  liltle  thicUcncd  ;it  I  he  inner 
margin  aiul  projecting  a  little  inward  in  the  middle,  and  rout  inuin;;' 
inside  the  series  of  small  proximal  teeth  on  each  side.  In  some  cases 
this  thickeiu'd  border  seems  to  arise  anteriorly  and  t<»  pass  under 
tlu^  i»osterior  series,  as  a  sli^^ht  Ibid:  iu  other  cases  it  's  continued 
directly  from  (uie  series  to  the  other.  The  posterioi-  series  is  nearly 
straiji'ht  and  about  twii'e  as  lon<;-  as  the  anterior  which  is  strongly 
curved  and  distally  somewhat  rec-cdes  from  the  thin  dorsal  inar;4iu. 
Tlu^  anterior  eml  of  th»'  shell  is  lather  short  ami  e.enly  rounded:  the 
posterior  is  about  twice  as  lonj"-.  a  little  wider  owin;>-  to  a  slight  ventral 
expansion,  comj)ressed  and  obtusely  lounded  or  subtruncated  at  tiie 
murjiin,  but  without  any  distinct  earination  or  anuulatiou.  The  pallial 
sinus  is  very  broad  and  deep,  extending;'  nearly  t(»  the  middle  of  tln^ 
shell.  The  inner  surface  is  smooth,  white  or  }«rayish  white.  The 
exterior  is  smooth,  except  for  the  delicate  lines  of  jirowlh,  and  covered 
with  ii  thin,  brilliantly  iridescent  epidernns  which,  in  li\»'  specimens, 
is  pale  yellowish  liieen,  but  in  dead  valves  is  pale  straw  color. 

Our  larger  s])eciiuens  measure  about  ITxtr  Id  mm.  in  lenuth  and  !•  or 
9.5  mm.  in  height. 

Found  at  many  stations  between  N.  hit.  41'^  28',  W.  lonj;-. »!,'»  ;>.")'.  and 
N.  lat.350  1(5',  \V.  lon<,^  75°  2'  30",  in  old  to  1,781  fathoms,  1S83-18.S7. 

MALLETIA  ABYSSORUM,  new  species. 

(flat I"  XCN'II,  lij;.  7.) 

Shell  small,  not  much  compressed,  lustrous,  iridescent,  subovate.  unt 
gapiu{^,  decidedly  iiieiiuilateral,  with  the  posterior  end  the  longer, 
broader,  obtusely  rounded,  Avithout  any  distinct  rostiation.  rnd)os 
rather  pronnnent,  rising  above  the  outline  of  the  dorsal  margin,  with 
small  beaks  turned  backward  at  the  tip.  Luiuile  and  escutcheon  aboi- 
tive.  The  short  antero-dorsal  margin  is  slightly  eoneave,  and  slopes 
rapidly  to  the  slightly  angulated  anterior  endj  the  ventral  margin  is 
very  broadly  and  evenly  convex,  the  eiirvature  receding  somewhat  pos- 
teriorly, so  that  the  greatest  height  of  the  shell  is  somewhat  back  of  the 
nuddle,  ])osteriorly  there  is  a  slight  extension  of  the  vd^x^'  corresj»ond- 
ing  to  an  indistinct  radial  ridge;  the  posterior  end  is  very  broad, 
obtuse,  not  angulated,  with  the  dorsal  nuirgin  nearly  horizontal,  slightly 
convex,  compressed  and  fornnng  a  slight  angle  whcie  it  Joins  the  poste- 
rior curve.  A  very  slight  groove  dclines  a  very  faim  escutcheon,  along 
the  edge  of  which  the  teeth  can  be  seen  through  tln;  substance  of  the 
shell.  The  surface  is  polished,  brilliantly  iridescent,  and  is  nuirked  by 
faint,  raised,  concentric  lines,  or  ridges  parallel  with  the  lines  of  growth  j 


I 


f 


STH 


rnnci'rfusus  or  riii:  x.\rin\.ii.  McsriM. 


\iil.,  W. 


\ 


lU'iir  llic  vcntriil  niiiri;iii  tlicsc  liccoinr  iimic  clcv  iitcd.  clciiily  (Iciincd. 
iiiid  iir(^  sc'inii;il«'il  hy  wider,  sli^litly  coiiciivi^  j^roovcs.  'I'lic  lnii;;('  pl.iti' 
is  liitluT  tldii  ;iiid  driiratc.  r(';4iilinly  ('iiivcd.  witimiit.  any  aii^lc  at  tlic 
lu'aks,  witii  the  uosh'iior  purtioii  ('(>iisid('ral>ly  fiic  loiuor,  'riicic  is  a 
small,  iiH'diaii.  s|K'('iali/<'(l  li<4aiiu'iil  w  liicli  (tcciipies  a  lunate,  or  nearly 
scMiicircidai"  noti-li  in  the  Iiinj;«'  jtiatc  dirocfly  Ix'ncatli  (lie  beak,  wliich 
docs  not  extend  llironijli  its  entire  widtli  altlionfjii  it  is  here  <|nite  n:ii 
row.  The  ])osterior  liuaunMit  is  ]>retty  well  developed  and  extends 
I'roni  llu'  heali.  wheie  it  is  ('los«'ly  eonneeted  with  the  median  portion, 
nearly  to  the  distal  end  of  the  series  ol"  teeth,  and  oeeiipies  a  distinct 
nnnjiinal  j^roove;  the  portion  nearest  the  beaks,  opposite  tlie  snndlo 
teeth,  is  thicker  and  darker  colored  than  the  rest  and  projects  sli«>hily, 
in  SI  dorsal  vi«'w:  a  delicate,  in('ons])icuons  jwntion  continues  a  little  in 
front  of  the  beak,  in  a  thin  jji'oove.  The  median  portion  of  the  liua 
nient  is  so  closely  connected  with  the  posterior  portion  that  it  appears 
to  be  a  specialized.  thicken<Ml  ])ortion  of  it,  but  is  evidently  honioloiiuus 
with  the  resilium  of  other  ji'enera;  it  is  sitiuited,  however,  outside  the 
series  of  teeth  iiiid  must  scr\'e  as  a  lifiainent.  The  hirjjer  te*  th  are  deli- 
cate, subacute.  V  shape,  compressed  in  a  direction  ]>arallel  \sith  the 
<l<»rsal  mai'uin,  with  deep  pits  between  them.  Tlu're  are  al)ou(  ten  in 
the  anterior  series,  indndin;;'  three  or  four,  veiy  .^mall.  scarcely  raised 
ones  next  the  beak ;  and  fourteen  in  the  posterior  series,  of  which  tiic 
seven  distal  ones  are  decidedly  lar,uer  than  the  rest,  the  tenth  to  tlic 
thirteenth  beiuff  tlie  largest;  about  four,  next  tln^  ])roximal  end  ot  the 
series,  are  like  small,  rounded  tubercles  or  y:ranules  without  a  V  shape 
foiin;  tbllowinii'  these  are  three  of  int<'rmediate  form,  increasinii'  in  si/c 
<listally.  the  seventh  beiu<;"  moieorless  V-shajJed;  these  smaller  teeth 
fbi'm  a  series  alonj;  the  inner  ed<;e  of  th(^  liin{>e-i)late.  iVu  edentulous 
rid ;;e,  about  as  lonu'  us  the  space  occupied  by  the  tirst  three  teeth. 
extends  from  the  lirst  tooth  to  the  liyaTuent  pit  and  is  continuous  with 
a  similar,  thinner  ridj;e  rauninj^"  below  the  ]i<:ament-pit  to  the  anterior 
series  of  teeth.  The  ])allial  sinus  is  of  nu)dera*^"  size  and  triangular  in 
form. 

Length.  5  mm.;  height,  1  mm. 

One  live  specimen  (No.  5-159),  statiou  2506,  otf  Cliesni)eake  r»ay.  in 
L*,(}li()  fathoms,  1885. 


\  \ 


ve\, 

tow  a 
lowe 
dors; 
unev 
little 
and 
I  ear 
shai  I 
n)al 
being 
beak, 
mar 
teelh. 
line 
I,ei 

(  MK 

in  1,5 


MALLETIA  POLITA,  new  species; 

(I'lMte  1,.\XXII,   li-r.   10.) 

Shell  of  moderate  size,  irregularly  ovate,  somewhat  swollen,  the  ven 
tral  region  convex  and  the  iiosterior  end  somewhat  produced  with  a 
short  rostrum.  l"]pidermis  light  yellow,  lustrous  and  iridescent.  I'lnltos 
not  i)rominent,  beaks  small,  strongly  incurved,  only  slightly  elevated 
above  the  margin.  The  autero  dorsal  nuirgin  is  slightly  convex  ami 
8ioj)es  gently  to  the  short,  obtusely  rounded  anterior  end  wlii<h  is 
slightly  augulated  in  the  middle;  the  ventral  margin  is  strongly  con- 


No   11:10. 


J>i:i:r-w\ri:i;  Mni  1.1  scA—yniunn    t\n  nrsii. 


877 


v«'\,  ii  little  i»i()»lnc(Ml  in   tlio  iniddlf.  :m(l   with  u  sli<ilit   iiu-urviitiiro 
toward  tlir  jtostciior  ciiil,  below  tlic  rostrum;  the  posterior  end  is  iiar- 
rowc'd  and  produced  into  a  .short  obtuse  rostiiini  wiili  a  nearly  straight 
dorsal  niarjiin.     Tiie  surlaee   is  eo\eied   with   i;itli<'r  line,  somewhat 
uneven,  eoueentrie  lines  and   undiilalions.     The  hi nyc  margin  is  but 
little  thiekeni'd ;  the  anterior  pttrtion  is  the  shorter  and  I  lie  m(H('  curved 
:nid   torms  a  veiy  obtuse  an;^le  with   tlu^   [)osteri(U'  portion  whicii   is 
1  early  straij;ht.    Tlu're  are  about  twelve  eonspi(!iu)Us,  rather  elevated, 
shaipteetli  in  the  anteriiu- series  besides  thii'e  or  four  minute,  proxi- 
mal fUies:  and  autre  than   twenty  in   the  [losteritu'  series,  the  nuudiei' 
Ix'in;^   iiMletermiiialde  owin^'  to  an  injury  to  the  margin  close  t(»   the 
beak.     The  external  li^iHuent  is  lar;;*':  and  <'onspicuous  and  (»((;upn's  a 
umrjiiual  ;;i'oove  evteinlin;;'  the  entire,  length  of  the  posleri(U'  sei'ies  of 
teeth.     Tliei'e  ai)pears  to  Inive  been  no  chondrophore  but  whether  the 
line  of  teeth  was  coutinucuis  is  uncertain. 

Len<:th,  1  t.r»  mm.;  height,  !•  mm. 

(Mie  valve  (No.  7S!>72),  station  U718,  N.  hit.  3S^  ,'!/,  VV.  lony.  71  r»!3', 
in  l,o(i!)  fathoms,  bSSi;. 

NEILO   Adams,  IS'  '  . 

\(ilo  II.  .  '.1(1  A.  Ada.ms,  (icinrii  <»(■  licrtiit  MnlJiLsca,  II.  ,,.  T)!!';  Ill,  pi,  ( wvi, 
1ij;s.  i,  7a,  111,  iS'tS.  — \  lauuia.  lul  liisn,  Aiiier.  lonni.  .Si  i.,  Ill,  |i]i.  57.  (JIJ, 
.liuiuaiy,  lS!t7. 

Tjiin;. —  \tiJo  cuiniiif/ii  Adams. 

The  type  species  of  this  jienus  has  an  oblonji'  shell,  with  a  strai;;ht 
postero dorsal  margin  and  a  well  (U'fmed  rostrum,  bounded  beneath  by 
a  proiKumced  furrow  and  a  nuir.uinal  indentation,  while  more  veutrally, 
the  margin  protrudes  somewhat,  the  i)outiii<:f  of  the  marjiin  eorrespond- 
iiio  with  special  lobes  of  the  niarjiin  of  the  numtle.  .V.  cKinlHfiii  from 
New  Zealand  is  <H)nc«uitrically  •••rooved,  but  \.  (jimiurn  (l)allj'  from  olV 
the  coast  of  laauuhu'  is  smooth  or  nearly  so. 

NEILONELLA    Dall,   1881. 

ISaliiru'ta  Si'.(HTN/..v,  Niiciilidi  ti  r/.iaric  iiiciid.  d"  Ital.,  K.  Accad.  I.inici,  1.  p.  117^, 

1S77  (iKit  Silirank,  ISOl'). 
Lvda  (srction   Svilntnlhi  )  l).\i.i.,  UiiU.  Mius.  Coiiip.  Zoill.,  I.\.  ji.  llTi,  ISSl;  .\II,](. 

L'r>i.  iss(;.-|->'((/(/;»i«  Dall, ]>.!'»);!. 

NeihmtUa  Nkioui.i.  and  licsu.  Aiiut.  .Iimni.  St  i.,  111.  pp.;")?,  (JI!,  January,  IS'JT. 

'rupc. — NvilomlUt  i'orpulcnta  Dall. 

Shell  small,  swollen,  short-ovate,  with  both  ends  obtuse;  the  poste- 
rioi-  somewhat  the  longer,  blunt  at  tip,  without  any  distinct  rostrum 
or  (carina.  Exterior  usually  eonceutrically  grooved.  Ligamental  area 
not  deliued.  Ueaks  usually  promiiuuit  ami  tur;'-'d  inward  and  slightly 
backward.  Ligament  well  develope<l,  extending  under  and  before  the 
beaks  in  a  distinct  groove,  nu)re  piomineut  behiiul.     liesiliuin  very 

'Dall,  Proe.  V.  S.  Nat.  Miis.,  XII,  p.  251,  pi.  x.  tig.  10,  1889. 


i 


«■ 


878 


rnocFi'Dixcs  or  the  XATroxtr.  ^rr^sl■:[■^^. 


vm,.  \x. 


miimt«'  or  iiciuly  aboi'tivo,  oc('iii)yiii^'  a  sliylit  notdi  in  the  dorsal 
iniir<:iii  uiidcr  tlio  boak,  external  to  tlie  scries  of  teetli,  wliicli  are  inter 
rnptiMl  only  by  a  small,  tliin  edentulous  space.  Pallial  sinus  small. 
Siphon  tubes  short.  Labial  i)alpi  hu'fje,  broad,  crescent-shaped,  with 
lonj^  tentacular  apptidajics.     (iills  small,  tritpietraL 

We  consider  tliis  ^roup  worthy  of  generic  rank,  ltap})ears  to  l)c 
nutre  nearly  allied  to  Malhtia  than  to  Yoldia  or  Lcihi.  We  can  find  no 
ji'eneric  chara<'ters  to  distinjiuish  Hall's  ty])ical  species  (X.  co>7>»/r;//,/) 
from  X.pu.sio,  which  was  tlie  type  of  (he  section,  iSdtnrnia^  projioscd 
by  Sej^ueuza.  They  ajiiee  closely  in  Ibrni,  external  sculi)ture,  arrani^f 
ment  of  the  teeth,  and  structure  of  lifjanuMit  and  resilium.  The  name. 
Safiiniia,  beinji'  preoccupied  by  Schrank,  1801',  we  have  adopted  Dall's 
name  for  both  of  his  s(>ctions. 

Tiie  following  sjx'cies  appear  to  belonj;  here: 

X.  corindeiitd  Dall  (type),  and  X.  <iii(t(lraiu/iil<(ris  (Dall),  West  Indies; 
y.Nericc<(  (.lellreys),  Ireland  and   IN)i'tug:al;  X. ;>/^s•/o  (Philippi).  Mcdi 
terranean  and  West   Indies:  X.  siiltorafa  Yerrill  and  liusli,    fiom  dtl' 
Cape  Ilatteras,  Xorth  Carolina,  northward. 


NEILONELLA  SUBOVATA  Verrill  and  Bush. 
(Plates  l.XXX.  \\'^.  10:   I.XXXU.  liiiH.:i.  I.) 

Yohlia  sericca  .Ikkkkevs,  var.  strioliila  N'KHiiii.i.,  TrMiis.  Coim.  Acful.,  \'I,  p.  L"_'(i, 
ISSI.— \  Knijii.r.,   I'n])!.  .(/ftrt/nw.s,   ]^•|)ol•t  U.  8.  Com.  Fisli  .•iiid  I'islicric- lui 

iss;{.  p.  .-.Tr).  iss."). 

Xrilonellii  xiihorala  Vi:i;i{ii.r>  and    lirsn.  Aiiicr.  .lonrii.  Sci.,  III.  ]>.  57,  lij^s.  7.  s,  L'-, 
.laiiiiai>  .  I  SI  17. 

Sliell  somewhat  swollen,  subova'te,  with  the  dorsal  nmrjjin  anj^ulatcd 
and  the  umbos  somewhat  prominent.  The  anterodorsal  margin  is 
somewhat  coincx.  i)inched  up  at  the  edf>e,  and  sloi)ed  {gradually  to  ilic 
eveidy  rounded  anteiior  end;  ventral  marj;in  is  broadly  and  nearly 
evenly  rounded  throujihout,  without  any  sinuosity,  and  forms  a  blunt 
point  at  its  Junction  with  tiie  postero-dorsal  niarj>in,  which  is  nearly 
straight  or  slightly  (!onvex  for  the  greater  i)art  of  its  length,  with  the 
edge  thin  ami  i)inched  up.  Tlie  umbos  aie  somewhat  prominent  and 
the  beaks  curve  strongly  inward  and  incline  a  little  backward  at  the 
tip.  The  ligament  is  well  developed,  dark  brown,  and  as  seen  in  a 
dorsal  view,  tills  a  narrow,  lanceolate  excavation  in  the  margin  just 
behind  the  beaks.  In  an  interior  view  it  is  conspi(;uous  behind  the 
beaks  and  occupies  a  curve<l  not(!li  immediately  under  them,  and  e\ 
temls  forward  for  a  short  distance  in  a  thin,  marginal  groove.  Tiie 
resilium  is  abortive  or  nearly  so;  in  many  cases  it  appears  to  be  repi'c- 
sented  by  a  nunute  black  speck,  adherent  to  the  ligament,  and  occu- 
pying a  minute  indentation  in  the  edge  of  the  hinge-margin  diicctly 
bt'iwath  the  beak,  external  to  the  series  of  teeth.  The  hinge-margin  is 
broad  and  rather  strong,  beeojuing  very  narrow  below  the  beak  but 
without  a  distinct  notch  or  chondrophore;    the  posterior  jtortion  is 


I 


NM.  ii:!n. 


DEi:r-nM'i:i;  MoLT.rstcA—VEuniLi.   txn  iir.-<ir. 


879 


nearly  straifijlit,  the  less  oblique  juid  considerably  the  longer,  and  forms 
a  Dioad  angle  with  the  anterior.  There  are  in  the  larjjest  examples 
about  eleven  or  twelve  teeth  in  the  anterior  series*,  count  inj;-  tour  or 
five  very  small  i)roximal  ones;  and  in  the  posterior  series,  fifteen  or 
sixteen  teeth  of  which  the  live  or  six  proxinuil  ones  are  niinnte.  In 
luiuiy  sj)eeiniens  the  two  series  are  not  distinctly  separjited  un<lcr  the 
beak,  in  others  there  is  a  very  minute,  edentulous  sp;ice  in  line  with 
the  ujinute  ligamental  notch.  The  larjjest  teeth  in  the  middle  of  each 
series  :irc  v<'ry  eloufjated,  erect,  acute,  with  tlu^  tii)s  turned  ui)ward 
toward  the  niarjjin.  The  surface  of  the  shell  is  covered  with  \ery 
rej^ular,  concentric  snlcations  sei)arated  by  narrow,  evenly  roiuuled 
ridfies  of  about  the  same  wi<lth:  in  most  cases  this  scidpture  is 
faint  or  nearly  obsolete  toward  the  imstero-dorsal  mar<,nn  and  on  the 
und)<)s.  In  many  specimens,  a  number  of  faint  radiatinj;  stria-  run 
from  the  und)OS  to  the  antero-ventral  marjiin,  similar  lines  sometimes 
occur  posteriorly.  The  ejjidermis  is  without  nuicli  luster,  of  either 
greenish  yellow,  light  yellow,  or  straw  color,  more  or  less  iridescent, 
especially  near  the  umbos.  Along  the  dorsal  nnirgin  the  outline  of 
the  teeth  can  be  imperfectly  seen  through  the  substance  of  the  shell. 
The  intei'ior  in  fresh  specimens  is  lustrous  bluish  white  and  in  some 
cases  is  distinctly  tinged  with  pale  tlesh-color.  The  muscular  and  pal- 
lial  impressions  ai'c  usually  imlistinct  but  some  specimens  show  a  small, 
but  distinct,  angular  pallial  sinus. 

The  alcoholic  specimens  when  <lissected  were  found  to  have  a  short 
8i])hon  and  a  large,  stout  foot  with  a  broad  disk  having  strongly  <-ren- 
ulate<l  edges.  The  labial  palpi  were  long,  crescent-shaped  and  the 
tentacle-like  ai)pendages  arising  from  the  outer  bases  of  the  exteriial 
])alpi  were  veiy  long,  slender,  and  coiled  in  a,  spiral.  The  gills  were 
long,  narrow,  and  ])rismatic,  one  on  each  side. 

Length  of  one  of  the  largest  specimens,  (!.5  mm.;  height,  1.6  mm.; 
thickness,  about  '.^.~>  mm. 

Young  specimens  about  2  mm.  long  are  more  equilateral  than  the 
adults  and  have  the  posterior  end  less  produced  and  moie  evenly 
rounded,  the  umbos  decidedly  i)rominent,  ami  the  surface  coveied  with 
line,  regular,  c<mcentric  grooves,  the  epidernus  showing  distinct  iri- 
descence. 

Found  in  large  nund)ers,  at  many  stations,  between  X.  lat.  12°  47',  W. 
long,  fil/^  4'.  and  X.  lat.  iJo^  W  oO".  W.  long.  74^  r.7'  40".  in  12."..]  to  1,7;?1 
fathoms,  1883-1887. 

This  species  shows  considerable  variation  in  foi'm  when  a.  large  series 
of  specimens  from  the  sauje  locality  are  compared.  Some  are  deci<ledly 
more  elongated  aiul  tapered  jmsteriorly  than  the  typical  form,  others 
are  somewhat  wShorter  and  moie  regularly  ovate  with  the  jtosterior  end 
blunter  or  more  rounded;  all  agree  essentially  in  scidpture  and  in  the 
pt  'uliar  structure  of  the  hinge  and  ligament. 

This  species  has  some  resemblance  to  J\r.  sericca  Jelfreys,  of  which  it 


■ 


880 


msBstKa 


ri!()ri:i:i)ix(!s  or  rni:  s.itiosji.  misecu. 


viir..  NX. 


was  loniu'vly  tliouf^lit  to  Itc  a  variety.  It  dinVis.  liowcvcr,  in  its  larf^er 
size,  more  ovate  form,  the  postei'ior  end  Ix'iiij;'  more  ])ro(luce(l  and 
tajx'H'd,  and  in  its  stroiij^cr  seul[)ture,  .V.  corimUntd  Dall  is  narrower, 
more  eloiij;ated,  with  more  prominent  beaks.  .V.  (lutttlntiuiiihiris  {\)i\]\) 
is  shorter  and  more  triaiiyuhir  in  form,  vath  the  postero  dorsul  margin 
more  obli<iiie. 

Suljtaiuily  'I'lXD^VIilN^.V;   ^'«■l•l•ill  .ukI    Hii.-^li. 

Ciifiilli'irniii   l"is(  ••KU,  Manuel  ("oiu'h.,  ji.  OSl,  1SS7  (in  ]iait  >. 

riii(l<ir'ni<i  A'kkkim.  and   l>rs[i,  Aiiior.  Joiini.  Sci..  III.  i)|i.  5S.  ti;>,  Jaimaiy,  issT. 

Tlie  genus  Tindaria  dilt'ers  so  widely  from  Mdllttia  and  otlier  genera 
that  it  seeme<l  neeessary  to  establish  a  new  subfamily  for  it. 

In  this  group  theshell  is  rather  thick,  short-ovate  or  veneriform,  with 
the  posterior  end  the  longer,  and  with  the  beaks  turned  forward.  The 
resilium  is  wanting.  The  ligament  is  well  <leveh)ped  and  lu'ominent. 
The  teeth  are  numerous,  V  shapetl,  in  two  series  which  are  fre(iuently 
continuous  proximally.  There  is  neither  pallial  sinus  nor  true  si^dious. 
The  nnintle  is  broatlly  open  ventrally,  but  there  is  a  sejiarate  anal  or 
elferent  oriliee  surrounded  by  small  sense  i»apilhe.  The  i»alpi  are 
large,  with  long,  slender  appendages.  The  toot  has  a  large,  termiinil, 
crennlated  disk. 

This  group  agrees  with  Malletina-  in  having  no  resilium,  but  tiie 
latter  has  well  developed  siphons  and  a  pallial  sinus. 


KO.  1  I 


TINDAHIA   Bellardi,  1875. 
Thnhirio  \'KI!1;II.I.  iiiid  IWsn,  Aiiicr.  .loiirn.  Sci.,  Ill,  jip.  TiS.  (i;;,  .I.ainiary,  ISHT. 

Tjiju: — Thiditria  araia  lU'llardi. 

iSeveral  recent  writers  on  these  shells  have  regarded  Tindaria  as  a 
subgenus  of  MaUctia.  In  reality  they  form  two  widely  <liverse  genera 
and  have  little  resemblance  excejjt  that  in  l)oth  the  resilium  is  want- 
ing. In  typiital  Timlaria  the  shell  is  sw^ollen,  short  ovate  or  subcor 
date,  without  any  rostration,  with  prominent  uml)os  and  with  the 
beaks  turned  forward.  In  fact  the  shell  may  be  <lescribed  as  \eii(  ri- 
form.  The  surfa(;e  is  usually  coU(;etitri<!alIy  grooved.  The  series  of 
teeth  are  often  contimu)us  nu'dially.     Theie  is  no  pallial  sinus. 

A  specimen  of  T.  aiiKthHi.s  Dall'  from  station  I'-'^S.").  among  I'^oraini- 
nifera,  in  7.'>()  fathoms,  not  very  well  preserved  in  alcohol,  has  the 
mantle  closed  for  a  short  distance  behind  the  anal  oritice  which  is  large 
and  surrounded  by  twelve  or  more,  rather  large,  unecpial  papilla',  but 
does  not  appear  to  be  cai)able  of  being  ]»rotruded  in  a  tubular  form, 
unless  a  very  short  one.  The  mantle  is  otherwise  freely  oi)en  along 
the  wiiole  ventral  margin  to  the  oral  area,  with  its  edges  neaily  plain, 

^Malhtit(  {TiiKlaria)  ri/lherva  Dall,  Itiill.  Mus.  Coiiii".  ZoiH..  XII,  i>.  l'r>l.  1>^|'; 
XVIIl,  )>.  i;W,1889;  —Malhtia  (diiabUis  Hall.  i».  138;  ^^Tiit(htvin  amahilix  Dall. pi.  \i., 
lig.8. 


'"T! 


NO.  li:!!l. 


i)i:i:i:n.iT/:i!  Mdi.iAsr.i-vEuuii.i.  asd  iirsii. 


.S81 


showing  (jiily  very  iiiiimto  papilla'  ixjstorioiiy.  Tlic  l(M>r  is  larjio  and 
stroiij;',  with  abroad,  stronji'Iy  civnulated  and  striated,  coacave  disk, 
pointed  in  front.  Tlie  j^illsarc  well  developed  and  somewhat  '"ri(|iietral, 
The  palpal  tentacles  are  rather  larj^e,  long,  tai)ered,  tri<[netral,  strongly- 
grooved,  curved  in  siekle-sha|)e.     The  pali)i  are  rather  broad  and  short. 

The  following  are  some  of  the  known  species: 

7'.  ((ratu  iJellardi,  and  7'.  xolida  !Seguen/.a,  fossil,  in  the  Itali:ji  ter- 
tiary formation ;  r.  ci/tlii'reii  1^',\\\  =  T.  tv'/<('r//bry»/.v  (Smith),  T.aiiiahHis 
Dall,  7'.  lurcii.s  Dall,  T.((ciiiiilH  Dall,  T.  cnncatu  (Smith)  =  T.sniitliii 
])all,  7'.  I((f<(  Verrill  and  I>nsh,  all  Florida  and  West  liidian  speeiesj 
and  T.  cdUi.stif'oniii.s  \'errill  and  Hush,  off  Chesapeake  May. 

TINDARIA  CALLISTIFORMIS  Verrill  and  Bush, 
il'l.itfs   I.XWIII.  lin.  1;   ],X\X,  tins.  ().  7.) 


Tiudxria  lullixliformiH  \'kukii.i.  mihI    lii^ir,  Aiiic 
:.'().  lit,  .hiiiuary,  IS!»7. 


.(ourn.  S<i.,  Ill,  ],.  r>!l,  ti<;s.  10, 


&■ 


^-y 


Shell  small,  stout,  thick,  regularly  ovate,  sculptured  with  very  regu- 
uh»r,  line,  concentric  grooves,  and  having  a  broad,  thick  hinge  margin 
with  a  continuous  line  of  teeth  and  no  choiulroi)hore.  I'mbos  swollen, 
beaks  i)ronnnent,  strongly  curved  inward  and  somewhat  forward,  with 
tlu'  nuclear  shell  (prodissoconch)  smooth  and  glossy.  The  lunular 
area  is  somewhat  excavated  but  has  no  delinite  boundary.  Anterior 
end  considerably  shorter  than  the  posterior,  both  e(iually  and  evenly 
rounded.  Antero  dorsal  margin  convex,  sloping  rather  rapidly  and 
forndng  a  continuous  curve  with  the  anterioi'  uuiigin  which  is  also 
continuous  with  the  more  broadly  convex  ventral  margin:  the  poste- 
rior end  is  evenly  rounded,  with  the  dorsal  margin  strongly  convex, 
sloping  gradually,  without  any  delinite  angulation.  The  surface  Is 
covered  with  very  regular,  line,  close,  concentric,  rounded  ridges,  sepa- 
rated by  semicircular  furrows  about  twice  their  width,  except  on  the 
und)os  where  the  two  are  about  «'(iiuil.  The  inner  veutral  margin  is 
plain,  sharp,  and  slightly  beveled.  The  hinge  inai  gin  is  widt^  and 
thick,  narrowest  Just  behind  the  beaks,  gradually  widening  and  thick- 
ening toward  both  ends.  The  anterior  portion  is  much  the  shorter  and 
somewhat  the  wider  and  slopes  more  rapidly;  along"  the  narrow  mid- 
dle i)ortion  the  teeth  are  (piite  small,  but  regular,  transverse,  and  sep- 
arated by  narrow^  intervals;  owing  to  the  absence  of  a  choiuli-ophore, 
there  is  no  delinite  center,  but  in  front  of  the  tip  of  the  beaks  there 
are  abcmt  eight  teeth  which  increase  rapidly  in  si/e  and  piominence, 
the  four  distal  ones  being  large,  elevated,  and  somewhat  V  shajx'd; 
behind  the  beak  there  are  about  twe^  ty-three  teeth,  of  which  nine  or 
ten  i)roxinuil  ones  are  snuiU;  they  then  coiuuumhu' to  increase  in  size 
and  length  so  that  eight  or  nine  are  larger  and  higher  than  the  lest; 
these  are,  however,  smaller  and  more  acute  than  the  largei-  ones  in  the 
anterior  portion;  two  or  thre.-  distal  ones  are  a  little  lesseU^vated  than 


"1 


* 


I'r 


(HV 


N.  M.  V(d.  XX- 


-5(» 


mmmmtm 


HX'i 


I'uoci.i.uiscs  OF  Tin:  XATKiSM.  Mvsr.ryr. 


Vnl..  x\. 


those  Nvliicli  ]»i'»'cc(l('  thrill  and  a  little  (lilfcrciit  in  turni.  .\bovi'  thf 
tt't'th  theiv  is  a  distiiict  and  latlitT  deep  snbniai\yinal  jrioove  tor  the 
lijiamciit  whicli  extends  eontiniiously  both  in  front  of,  and  behind  the 
beaks,  r.eliind  tlie  beaks  there  is  a  distinct  rounded  ridj^e  running 
outside  of,  and  jiaraUel  with  the  li,uamental  j;roove  and  torniinatinu'  iit 
the  distal  end  of  the  row  of  teetli.  rallial  biie  entire:  no  siplion  :  aii;il 
o])eniii}^  separale'd.  surrounih'd  by  about  twelve  unequal  i)ai(ill;e:  else 
where  the  o])eii  mantle  edu'e  is  nearly  plain:  foot  lai'ji'e  with  a  creiiate 
disk. 

Epidermis  pale  yellowish  browu:  interior  ylossy  bluish  white  without 
pearly  luster. 

fiength.  <S  mill.:  heij;ht,  0  mm.:  thi(dvuess,  about  1.5  nun. 

A  small  s]>ecimen  (i  mm.  lon<4,  I'.o  mm.  high)  from  station  271  I.  is 
doubtfully  icferred  to  this  species.  Externally  it  is  covered  witli  \fiy 
line  reynlar.  concentric,  ra.ised  lines  and  grooves,  agreeing  W(dl  with 
the  eorresi)oiidiiig  uuibonal  itortioii  of  the  type.  The  epidermis  is  thin. 
l)ale  straw  color.  The  outline  is  also  similar  but  the  posterior  half  dt 
the  shell  is  relatively  a  little  bidader.  owing  to  a  slight  expansion  di 
the  postero-ventral  margin.  The  beaks  api)ear  to  be  relatively  less 
l)ron!inent.  The  external  ligament  is  well  de\elo]»ed  both  sides  of  the 
beaks,  aud  is  slightly  thickened  Just  under  them,  and  tills  a  very  slight 
notch  in  the  edge  of  the  hinge  margin  above  the  teeth.  The  hinge 
l)late  is  relatively  broad  and  strong,  esi)ecially  anteriorly.  There  arc 
thirteen  ])osterior  and  nine  anterior  teeth,  the  two  series  separated  hy 
a  small  edentulous  sj»a(;e.  Some  of  the  distal  teeth  in  the  anterioi 
series  are  unusiutUy  large  and  stout  and  exceed  any  of  those  in  the 
])osterior  series.     The  pallial  line  i«  distinct  and  entire. 

One  live  specimen  (station  i'."»i)<)),  N.  hit.  37"^  L'3',  W.  long.  03  s  .  in 
2,(!l'()  lathoius.  188."».  One,  \ery  young,  live  specimen  (station  L'71 1  .  N. 
lat.  3S'  L'L",  \\.  long.  7(r  17'  30",  in  l.Si!.-)  fathoms,  ISSC. 

This  speeies  is  remarkable  for  its  thick,  linn  shell,  regular  ('\ate 
form,  and  very  even,  concentric  sculpture.  In  form  and  general 
appearance  it  resembles  some  si»ecies  of  Callusto. 


I 


I 


W 


TINDARIA   LATA,  new  species. 

Shell  rather  thick,  somewhat  comi)ressed,  broad-ovate,  equilateral, 
narrowest  in  front  of  the  beaks,  the  posterior  end  somewhat  jirodiued 
and  very  broad.  I'mbos  only  slightly  prominent.  Ueaks  smaU,  rather 
acute,  turned  directly  forward  and  closely  api)ressed  to  the  margin. 
Noluuule  nor  escutcheon.  The  antero  dorsal  nuugin  is  nearly  straight 
and  slo[)es  but  little,  but  becomes  a  little  convex  and  ]»asses  insensilily 
into  the  evenly  rounded  curvature  of  the  anterior  end;  the  ventral 
margin  is  very  evenly  and  broadly  rounded  but  the  curve  recedes  as  it 
]»asses  backward  so  that  the  highest  }»art  of  the  shell  is  distinctly 
bcdiiiid  the  middle:  the  ])osterior  end  is  very  evenly  and  broadly 
rounded  without  any  angulation;  the  posterodorsal  margin  is  (Miisid- 


%m 


tiu.  n:;!). 


i>/:i-:i'-u\i  11  u  Moi.i.isc 


\i:iu;ii.i.  .1X1)  III  >//. 


8S3 


erably  l(»ii;:;t'r  tlian  the  iinterior  and  slopes  i»r»'tty  ii'iiularly  ami  i^radu- 
ally  iVoMi  the  beaks  to  the  posterioi-  exticinity.  The  sm  lace  is  covered 
with  very  lej^ular.  ratliiM'  coarse,  rounded,  coneentric  ridycs  scparati'd 
by  deep  I'lirrows  of  aboat  the  same  brea<ltli.  The  epidermis  is  lii;ht 
straw  color,  only  slijiihtly  Instrous  and  scarcely  iridescent.  The  hiiij^e- 
l»l'it(;  is  large  and  stronj:'.  much  elonj-ated  ]>osteri()rly.  the  t\vo]»;irts 
lui  rinn,ii'  a  very  ol)tuse.  curved  angle  at  the  beaks.  The  anterior  jiortion 
is  the  broader,  much  the  shorter,  and  bears  about  nine  teeth,  of  which 
the  three  distal  ones  are  nuu-li  the  larjjer  and  occupy  about  one  halt 
the  len.u'tli  of  the  series,  the  pi'oxinuil  ones  beiny-  very  small.  The  [m)S- 
terior  i)oition  is  luirrower  and  curved  throuiihont :  it  bears  seventeen 
or  eiyhteeu  teeth  of  which  seveu  or  eijiht  i)ro\imal  ones  are  very  snudl 
and  acute.  The  hinge-plate  becomes  (juite  narrow  under  the  beaks 
where  the  two  series  of  teeth  are  interrupted  by  a  \ery  small  edentu- 
lous s])aee,  scarcely  wider  than  the  adjacent  teeth.  All  the  l;n\uer  teeth 
are  rather  crowded  and  compressed  in  the  direction  at  right  angles  to 
the  line  of  the  hinge  so  that  they  are  only  slightly  V-shaped.  Seen  in 
a  dorsal  view  they  ai)pear  thin  and  not  very  i)ronniient  above  tlu;  mai- 
gin  of  the  shell,  when  the  tips  are  broken  thi'y  otten  appear  three- 
lobed.  The  ligament  is  well  de\eloi»ed  and  occupies  a  distinct,  sub- 
nuirgiiiid  furrow  behind  the  beaks.  The  muscular  scars  are  well 
nuirked,  small  and  nearly  round;  the  pallial  line  is  interrupted  at  a 
point  a  short  distance  from  the  posterior  muscular  scar  but  there  is  no 
visible  sinus.  The  interior  of  the  shell  is  grayish  white  but  not  pearly; 
the  ventral  edge  is  slightly  beveled. 

Lengtli  of  the  largest  speciuu-n,  7  iiDu.;  height.  ■")..")  mm. 

Two  specinu'iis,  among  h^orannnifera.  at  station  L*3s.j.  >'.  Int.  L'S"  51', 
W.  long.  88-  18',  in  7:50  fathoms,  188'>. 


TINDARIA  CUNEATA  (Smith  i   Ball. 

MaUi'tiK  ciDHdlii  SMiru.  K.  A..  Ixi'itort  \'oy.  Chnlleninr,  ZoiU.  I.aiiiel!il)r;iiu;liiata, 

XIII.  p.  IMT,  1>1.  \\,  ti^-.s.  10.  Kif/.  1XS5  (luit  ,JelVr.'y>K 
Mallctia  (Tifuhd-iii)  smithii  K.vi.i..  Hull,  Muh,  ('oiii]i.  Zmil.,  XII,  ]>.  255,  ISsti. 

A  single  young  \alve,  among  I'oraminifeia,  at  station  2Vhh),  N.  lat. 
'>7'  '»i*',  W.  long.  .8'  7'  30".  in  338  fathoms,  188<J.     Off  Grenada  and 

0  West  Indies,  in  31»(>  to  1,140  fathoms.— Smith  and  Dall. 

As  the  species  described  and  ligured  by  JNlr.  Smith  under  the  nanu^ 
oi Mullet iu  ciDwata  is  a  true  Tindmia,  his  name  does  not  contlict  with 
the  MnJUila  vunenid  of  .lelfreys  which  is  a  true  MdUetia,  and  therefore 
should  remain  untdianged. 


Subgenus  TINDARIOPSIS  Veirill  and  Bush,  1897. 

Tiiiduriopnii  N'l.iiiui.i.  ami  Hrsu,  AiiitT.  .Idiirii.  Sii..  111.  jip.  51i,  (Hi,  .laiiiiai  y.  1S97. 

Ti/iH'. —  Tindariojtsis  (itjathUlx  (Dall ).' 

^  MiiUiCut  {Thiilaria)  aijiilliida  liall,  I'nx;.  I'.  S.  Nat.  Miis..  XII.  p.  'S>'2,  i>\.  Mil,  lig. 
10,  i)<S[K 


^^fTfim 


Ss4 


ri!<>ci:i:i)iSiis  or  rut:  xatiosal  mi  s/:i  m. 


vol..  XX. 


This  (li\  isioii  wiis  proposed  for  those  species  w  hieh  liave  u  short  ros 
tiiim,  (leliiied  by  ii  riidial  rid^e  and  a  furrow.  The  t \  i)e  has  a  well- 
marked  d(»rsal  lijianieiital  furrow  and  a  small  notch  or  "socket"  undei- 
tile  beak  for  the  specialized  part  of  the  ligament,  it  is  uncertain 
whether  it  has  a  siphon  and  a  pallial  sinns.  In  ease  these  are  present, 
it  should  form  a  distinct  yenus  and  be  placed  under  Mallet iine. 

ANALYTUAI.    TAIil.Kul'    i;i:(  KM     >C  ItlAMI  M  1>.   (iKNKIJA.   AM)    Slllli  KNKliA    ill      I.KJilh.l, 

AM>  \f(   11.11)  i;    lIKlIi:    ADoriKD. 

A.  Sliell  not  ii;ii)iii;;.  sli()rt-()\  iitt',  siibtiiuoiiiil,  or  roiiiHlrd;  jjostcrior  end  without  .1 
I'ostriiiii;  l)u;iUs  usii.illy  ciirvcil  luickw  anl ;  no  siiilion  tubes  nor  juillial  sinus. 

Xiiciilidd'  (I'Orbiuuy. 
15.  Shell  more  or  les.s    trigonal,   usually  oblique ;  jxi.stciior  end  usually  shoiici  ; 

beaks  tinned  backward XiKiiIhur  Veriill  and  liu>ii. 

('.  Teeth  niiinerons.  transverse.  V'-sli.iped,  I'orininy  two  eonvexly  arched  or  aiigu- 
lated  series;  a  distinct  luedi.iu  i  hoiididiihore;  no  lateral  teeth. 

\iiriili(  Lamarcli. 
cf.  Teeth  tew,  not   loniiiny,-  lonji  series;  a   loiin;  lateral  tooth  in  eaih  vahe;  ih> 

median  ehondrophore .ynciilina  d'Orliiuux 

AA.  Shell  ovate,   oblong  or  lanceolate;    ])csterior  end  iiciierally  the  loiiucr  and 
usually  more  or  less  rostrated;  siphon  tiil)es  and   pallial  sinns  geiier.illy  pretseiit. 

I.idid'i  11.  anil  A.  Ad.inis. 
(',  Cartilaue  or  lesiluini  ])i'esent,  not  closely  united  with  the  cNti'mal  ligament. 

l.iiHiiii  II,  ,iinl  A.  Adanw. 
((.    h'esilium  supi)orted  by  a  detinite  concave  ehoiidropliore  extending  inwani  lu. 

or  beNonil,  the  inmr  edge  of  the  hinge-plate. 
/'.  .*^hcll  not  gaping  unless  at  the  end  of  the  lostruin. 
c.  Shell  distinctly  rostrated  and  earinated  posieriorly. 

I.tda  Schumacher  (sense  extendeili. 

(/.  Shell  elongated  and  tajiered  i)osteriorly,  rostrum  long,  bicarinate,  blunt ;  li;;.i- 

niental  area  or  escutcheon  long   and   well-delined ;    iiallial  sinus  and  ■'iphnu 

tubes  di'Vclo]icd I.i  da  i  sense  lestriited  1. 

lid.  Shell  shorter,  swollen,  i)\a!i?  or  oblong,  posteriorly  not  much  elongated;  ros- 
trum short,  usually  acute,  unicarinale. 
('.  Shell  o\ate,   rostrum  sniiill,  acute;  ligamental  are.a   or  eseutcdicon   distinctly 

bordered  by  a  carina, 
/'.   K'ostrum  short,  subacute,  siibniedinii,  delincd  below  by  a  ventral  sinuositv  or 

emargination Jiiiioni<i  Segiienza^:;  Ledditt  Verrill  and  Hush. 

If.   Iv'ostruni  short,  dorsal,   not   detined   Ixdow  by  a  ventral   sinuosity:   ]iostei(i- 

dorsal  margin  concave;  escutcheon  •sunken Iiiiiitcria  liclhirdi. 

ii\  Shell  ol)loiig.  angular,  sulitriine.ite,  rostrum  short,  angular,  dorsal,  defined 

below  liy  a  marginal  sinuosity;  escntcheim  well-delined I'orthtiidia  .Milrcli. 

vcf.  Shell  not  rostrated,  small,  ovate  or  ellijilical,  rounded  at  both  ends,  anterior 
end  the  shorter,  no  carina,  luniile,  nor  escutcheon  ;  caitilago  posterior,  iiitii- 

nymjihal Mhrojioldin  \'errill  and  liiisli. 

hh.  Shell  oblong  or  lanceolate,  compressed,  nearly  plain,  more  or  less  g.ii)iiig  .it 
both  ends;  rostrum  not  Nvell-delined;  jtallial  sinus  large  and  broad;  tubes  lonu. 
united. 
'/.    Teeth  transverse,      -sh.-iped,  immerous,  in  two  long  series;  chondropliorc  larue. 
concave,  iirojecting  strongly  inside  th(!  hinge-plate. 

Yoldiii  Moller  (sense  e\teiidein. 
h.  Shell  large,  eompri'ssed,  rounded  an',   viorly,  broadest  posteriorly  with  a  ]ios|cio- 
ventr;il  inotrusion  .'ind  radial    ridgo;  rostrum  short,  broad,    poorly  dcliiicil; 
external   ligament   well  developed,   jirominenfc  both  sides  of  the  beaks,  oci  11 
jiying  a  continuous  furrow;  no  liiuiilo  nor  eseiit<'heon. 

Mcijayoldia  Verrill  and  Hn-lt. 


i 


* 


it 


NO.  11: 


p 


f 


No.li:i9.  1)I:EP-W.\TI:I!   Mol.I.l  S(A—\KI!i;il.L  AMI  l:i  s/l.  S85 

]ih.  Slicll  liiiiifolato  or  loiin-oviitt',  postoriorly  hjhiowimI  aiitl  .-umiw  liat  floii- 
gatt'd,  nior(>  or  loss  simioiis  Itclow  ;  rostrnin  Hli<ilitl y  (lelini'tl,  smooth  or  Mli;;litly 
carinatc  ;  cxtiTiial  lij;anuMit  iVrl)ly  <li'velo|i(>il )'ol(liii  i  vrnsc  risti  icii-il  i, 

/(///(.  Shell  oliloiiy;,  smooth.  ]ilaiii,  liliiiil  ami  roiimlt'd  at  both  I'lnls.  without  iiiiy 
(liHtiiW  carina,  siiiiiosily  or  rostrum (tvthoinihWn  \'(  rrill  and  liiish. 

hhhh.  Sh.  11  thin,  comiiri'sscd,  narrow-ljinci'olali- ur  l<ini,'-rili|itl(al.  m.irl.v  ic|Mi- 
latoral,  jind  jiajjinii  at  lioth  ends:  sculjitiire  oldiipic. 

Adiami  1 1.  and  A.  .\daui>. 

hhhlili.  Slitdl  hyalino.  oblonij-ovatc,  hroad  ]inst(Minrly,  ((iiircntrically  si  nl|»- 
tiirrd,  rostrum  nearly  oli^olctc I  (IvnuiUn  \ CrriJl  and  Hash. 

fltj.  Shell  thin,  ohloiii;-.  im-iinilatcral.  lilnnt  at  liotli  nids.  not  ro>tratcd  nnr  <'aii- 
natcil:    teeth   lew,  lamellai.  ver>  oldic|iie.     Type,  >'.  /'»((7/7/.v  .letVreys. 

Sillriihl   .letVrcys. 

<((/.  Siiell  small,  iiearlx'  )dain,  not    mncli   nitrated  nor  rarinaied:  re^ilinni  with- 
out a  ]ir(iminiiit  ehoinlrophore,  sitiiiited  in  a  nuti  h  in  the  liinue-maijiin.  inter- 
I  ii])tin,u'  the  sciies  ol'teeth. 
/.  Teeth  V-sli;i]»ed,  numerons  in  liotli  seiies. 
tn.  Sjiell  oldonji  or  snhox  ate.  Idnnt  ]>ostcriorly.  with  a  slinhtly  siniions  ninrjjiti, 

son  uptimes  snhrostrate.  not  carina  te YnJiJiillii  \'errill  ami  i'.nsh. 

mm.  Shell  ri^unlarly  ovate,  rounded  at  both  ends,  not  siinmus  iinr  eat  inate,  i  .'i 

no  jiallial  sinus SarepUi  A.  .\dams. 

11.  Shell  short-ovate,  not  sinuous  nor  aniiulatcd;  teeth  few.  oblii|ue,  not  ret;n- 

larly  V-sliaped.      Typt",  /'.  oraliix  Se;;-uen/.a I'lumeohts  Se'^iien/a. 

CC.  No  true  resilium;  liuameiit  well  develo]ied,  often  promimMit  liehiml  the  beaks 

which  are  usually  turned  I'orward. 
1).  .^iphon  tubes  and   jiallial  sinus  jnesent;  teeth   mostly  V-shapeil.  in   two  lonj^ 
series,  often  interrupted  by  a  median  edv^utuloiis  space. 

Mdllclhiii  If.  ;iml  A.  Adams. 
«.  Si]>lion  tubes  Iouk;  pallial  sinus  larjic :  shell  elonj;ated,  jj;a]iinii'. 
}).  Shell  oblon;;'  or  elliptical,  blunt  jiosteriorly,  not  distinctly  rostrate:  seiie>  of 

teeth  unequal;  those  in  the  anterior  series  fewer Malletia  1  >esinoulins. 

j>p.  Shell  loufi-ovate  or  obhniji,  broadly  aiiu;ulated  and  sinuous  posteriorly  :  dis- 
tinctly rostrate  and  I'arinate;  two  series  of  teeth  m^arly  e(|ual. 

Xc'ilii  II.  and  A.  Adams. 
()().  Siphon  nnd  pallial  sinus  snnill,  shell  ovate,  not  ;.japin<;;  a  rudimentary  mar- 

liiiial  resilinm \<ih>iiillii  Kali. 

1)1).  Shell  short-ovato  or  subiordate.  closed  at  both  ends,  umbos  i>romiiicnt;   li.ua- 
mcnt  entirely  external;  series  ot' teeth  jjenerally  continuoiis. 

Thidariitti  \errill  and  I'ush. 
«.  Shell   refi'ularly  ovate,   orooved,    without   rostrum    or   carina:    licaks   turned 

forward  ;  no  jiallial  sinus Timiiirin  liellardi. 

as.  Shell  ovute,  with  a  distinct  jiosterior  sinuosity  and  .a  short  rostrum. 

TiiuUirioiixm  X'erriil  ami  Hii>h. 

Fiunily  SOLENOM  Y  ID.K. 

SOLEMYA  GRAMDIS,  new  species. 
I  Plat.    I.XXXVI.  lij-s.  1,  •_'.  1 

Siiell  large,  <M>n.si(l(M}il)ly  bi-oa<ler  aiitorioily  tliau  i)()sti'ri()rly.  dorsal 
margin  in  front  of  tlie  beaks  straight  and  thii-koned  by  an  internal 
ridge  and  a  strong  epiilermal  fold.  At  tlie  anterior  end  tlie  valves  gape 
widely,  and  tlie  edge  of  eacli  is  divided  into  six  or  seven  long,  nearly 
regular,  digitate  processes  of  nearly  nniforni  widtli.  and  obtu^ely 
rounded  at  the  ends,  se[)arated  by  notches,  rounded  proxinially.     The 


:|^ 


m^ 


rj:i>c/:i:ni.\iis  or  riii:  \. trios. if.  mis/.im. 


VOL.  XX. 


general  outline  of  this  end  is  broiidly  trnnrute;  tlie  ventral  niaryin  is 
soniewliat  convex  l)Mt  slopes  njjward  toward  tlie  jtosterior  end  and  is 
nearly  straii;lit  aloiij;'  the  middle:  Mie  jxjsterior  end  is  short,  evenly 
rounded,  with  the  dorsal  mat  j;in,  behind  the  l)eaks,  strongly  incurved; 
the  large  black  ligament  which  occupies  this  area  is  continuous  with  the 
epidernds,  so  that  its  outline  forms  a  curve  nearly  in  line  with  tiiat  of 
the  anterior  end,  and  shows  but  a  slight  angle,  or  lobe,  at  the  outer  end 
of  tiie  dorsal  line.     Tiie  umbos  are  thittened,  and  scarcely  prominent. 
The  whole  surface  is  covered  with  a  thick,  smooth,  glossy  epidermis, 
chestnut-brown  in  th(^  yuing  and  brownish  black  in  adult,  which  ante 
riorly  is  divided  into  several  rather  broad  digitations  that  are  shorter 
aiul  somewhat  wider  \enti'any,  their  length  diminishing  from  the  nn'd 
die  of  the  anterior  end  to  the  \entral  margin,  along  the  nnddh;  of  which 
there  arc  no  digitations,  but  short  and  broad  ones  again  apjiear  pos 
teriorly.     The  siiell  is  sculptured  by  radiating  ribs  and  furrows  which 
are  but  slightly  developed  on  the  middle  region  but  become  large  and 
.strong  anteriorly  and  smaller  an<l  closer  ]»osterioily.    On  the  anterioi- 
l)art  these  ribs  are  broad  and  flat,  separated  by  wide,  tlat-bottonied, 
furrows  often  nearly  as  wide  as  the  libs;  on  the  middle  area,  the  Inr 
rows  are  shallow   and  rounded  while  the  intervening  spaces  are  Ihit, 
sometimes  broad,  at  others  narrow,  this  region  ai»pearing  comparatively 
smooth,  some  specimens  showing  but  slight  indications  of  grooves  a  ml 
ribs;  ])Osteriorly  these  are  somewhat  nn)re  numerous,  narrower,  ott»ii 
about  equal  in  wi  1th.     In  specimens  of  medium  size,  there  are  from  six 
to  eight  of  the  large  anterior  furrows  and  as  many  ribs;  the  edges  of 
tlie  latter  are  somewhat  elevated  above  the  middle  portion  and  tlMso 
thickened  margins  extend  out  along  the  edges  of  the  digitations  which 
otherwise  (or.espond  to  the  furiows.     Internally  the  shell  is  white. 
moderately  thick,  the  anterior  jxntion  oblong  with  obtusely  truncated 
end,  the  dorsal  and  ventral  nmrgins  nearly  parallel,  and  the  posterior 
uuich   narrower  and  tapered  to   an   obtusely  rounded  end,  with  tiie 
dorsal  margin  excavated  for  the  ligainental  area.     The  surface  shows 
distinct  but  not  very  pronunent  grooves  ami  ridges  corresjjondiiig  to 
the  exterior  ones;  at  the  anteiior  end  the  margin  shows  slight  lolies. 
corresponding  to  the  intervals  between  the  epidermal  digitations.    The 
anterior  muscular  scar  is  large  and   rounded,  the  posterior  one  is 
smaller  and  subovate.     Anteriorly  the  hinge-margin  is  thickened  in 
both  valves,  running  from  near  the  beak  nearly  to  the  end;  posteriorly 
it  is  more  strongly  thickened  by  a  sinuous  callus  to  which  the  lig  i 
nient  is  attached,  while  under  and  Just  in  front  of  the  beak  the  maruin 
is  excavated  for  the  reception  of  the  cartilage  which  continues  foi  w;iid 
in  a  groove  and  is  continuous  with  the  broad,  dorsal,  e[>idermal  mar- 
gin which  unites  the  two  valves  throughout  their  length.    The  posterior 
ligament  and  anterior  cartilage  ai)i)ear  to  blend  Just  beneath  the  t)eaks; 
the  commencement  of  the  cartilage  is,  however,  indicated  by  a  slight 
notch  in  the  callus-nuirgiu,  in  both  valves,  and  the  ligament  ai)iteais 


mmmm 


mmmmmmm 


NO.  1130. 


DEKP-\\ATi:i:  MOLLrsr.i-vr.uuii.i.  wit  l.Csii, 


mi 

to  extend  forward  in  a  point  between  tlie  two  sides  oi'  tlic  ciirtilaiic. 
There  are  no  transver.'^e  co.sta-  or  l)uttres.se.s  for  streiijitlieniriy  tiie  Iiinrre- 
niaryin. 

Ijitirelengtli.inclndinj,' epidermal  lubes,  ,')l  miii.;  eiitiie  li("i.o|it,„p,„). 
.site  the  beak.s,  22  nmi.:  hei-iit  of  the  anterior  tliini,  2(;  mm.:  breadth, 
in  the  middle,  12  mm.;  length  of  longest  (limitations,  about  lOor  12  mm.; 
length  of  the  shell  itself,  12  mm.:  height  at  the  mid.lh",  1.-.  mm.;  length 
from  beak  to  anterior  end.  .SO  mm.;  to  posterior  end,  II  mm.  I'nin- 
meats  of  specimens  more  than  twice  as  lar<;-e  as  the  one  mcasnred  havt; 
been  taken.  In  one  of  these  the  height  of  the  shell  withont  the  epider- 
mis is  2."»  mm. 

Two  ^'ood  .specimens  and  .some  fragments,  at  fonr  stations,  between 
N.  hit.  ;U>"  o8'  ;K)",  \V.  long-.  Hr^  30',  and  X.  hit.  '61'^  24',  W.  long.  7117' 
in  3(»()  to  l.GOO  fathoms,  1880-1884. 


I 


KXrLAXAI'loX    OF   IT-ATHS. 


Thr  (i,i;iirfs  on  rhiic  \\\  li^;.  1',  I'l.it.   \  1.  (i->.  I,!',  I'l;ilf  \  II.  11-.  !i,  I'lnto  XXIJips. 
1.  •-'.  uimI  I'hilc  .\.\\  .  li-.  S,  wciv  (Ir.nvii  l.y  .Mr.  .1.  II.  Uliikc.      I'latt'  .\  \  .  <i-s. !».  III.  H. 
well' (Irnwii   Ipy  Mr.  .1.    II.  Iliiicrtuii.     'I'lic  nther  (i;,niri'8  me  iill  ciiiiu'ru-liniila  (lr;i\v 
iii;;s  by  Mr.  A.  II.  V.iiilj. 

I'lATi;  I.XXJ. 

Y^\<i.  1.   ('afdiiiiinjn  (jhtpld   Itn.sli.  y.  f<l!).     Dmsiil   \\v\\   di'  tyjx'  >])c<inii'ii   Xu. ;;,"»:;( li'; 
X  Id  (liiiiiii'l.r^. 

•2.   <'iiKi>i<l<iri<(  (iiriirii  (M.Sais)  l>all.  )>.  XDW.     Iiitcriur  of  ii   left  v.ilvo  riuiii  .sta- 
tion 70;    X  iiliont  Ii.     lirdkcn  oiitliiic  rcstoiiil  liy  lino  of  ^xiowtli. 

3.    ('(irdioiiii/ti  f/iiniiiit   X'cnill  ,'inil   ISusli,  j).  SO!).      Doisiil    \  icw  of  sjK'cinii'n   Xo. 
•II  I.'.i;;    X   If. 

I.   'I'lic  s  inif.     Intcriui- of  ]r||  xalvi;  of  llic  fanir  .specimen  :    X  alioni  13. 

.').   rnspidiiriii    media    N'oiiill    and    I'.asli.    jj.SOI).      Iidisal   \ic\v  of  sjn'cinicn   XH 
■lilliL'O;   X  •".. 

•  1.   'I'lic  sanio.     Inti  rior  of  lolt  v.ilvc  of  lype  sju'ciincn  Xo.l!l018;    X  ."i. 

7.  ('iis}>id(iri<i  J'rntcnin  Xi'VvUl  and   I'.nsli,  [(.MILS.     Dor.sal  view  of  sijccinion  Nd. 
1. ■-!!•(  12;   X  .'). 

s.  TIio  s.iinc.     Interior  of  left  valve  of  typo  .speeiineii  IVoin  station  8!»2;   x  '». 

0.   Ciinjiidiirid  (jhiriiiliH  ((i.  ().  Sjiis)  Dall.   ]>.S()0.     Doisal   view  ot'  specinicn   .Vo. 
4902:5 ;   x  .'.. 

Pi.,\Ti:    LXXII. 

I'ijjj.  1.   (iisj)ld(U-ia   iniddtn   \errill,  ]>.  7ilN.      Hinge  of  liotli   valves  of  .specimen   Xi>. 

r)2.")l7;   X  aliont  ;{. 
2.    I/<iI()niii)ipli((  slri((lell((  ^'errill  and  linsli,  i).810.     Ilin^i'  of  a  riylit  valve  f:oin 

station  2(>.'').");    x  25. 
;>.  The  same.     Tinned  np  to  show  anterior  tootli ;   X  2.">. 
t.    Mjinnn-ti  )(/y(Hf),s((  (JellVeys)  \'errill  and  Hnsh,  ]).  l-ill.     Hinge  of  rijjlil  vahr 

of  si)ecimen  Xo.  .■')2.")l  I  ;    x  iibont  1(1. 
.">.    Cii>^pid/(ii(i  nntricosd  Verrill  and    Hnsli,  p.  802.     Ilinnc  of  a  rigiit  valve  Xo. 

ri2.->l8;   X  5. 

6.  Ciispidarid  roxtrahi  (Speni,der)  Dall,  p.  800.     Hinge  of  both  valves  of  speci- 

men Xo.  100()7;   X  5. 

7.  Cuxpidaria  iniriidfi  Verrill  and  Hnsh,  p.  7911.     Hinge  of  both  valves  of  type 

specimen  No.  78789;   X  abont  (i. 

I'LATi;   LXXIII, 

Fig.  1.   Cuspidaria   siihlorUi  (Sars),  ]>.  80(i.     Hinge  of  both  valves  of  si>eeinien 
52,-)  15:   X  9. 


Xo. 
52,-)  15;   X  9.  ' 

2.  Cardiomyii  jxrroslniid   Dall.   p.  81)9.      Hinge  of  both   valves  of  sjiecimen  Xo. 

48933;    X  22. 

3.  Cardiomi/a  unillicostatK  \'errill  and  Smith,  ]>.  808.     Hinge  of  l)oth  valve>  of 

specimen  Xo.  48917;   X    I.J. 

4.  Cardionnja  (iln/tinicuht  Verrill  aud  Itnsh.  ]i.80t).     Hinge  of  two  separate  \;il\es 

Xo.  7889(5;   X  4i. 

5.  Cuapidftria  glacialis  ((i.O.  Sar.s)  Dall.  ]>.  S()0,     Hinge  of  right  vahe  of  sjjeci- 

men  Xo.  49011 ;   X  4  A. 

6.  Ciixpidarhx  midia  A'errill   and    Hush,  ]i.  80  1.     Hinge   of  both  v.ilves  of  type 

.specimen  Xo.  49018;   X  9. 
888 


6. 


NO.  ii;;o. 


DEKI'-UA  ll.l!  MOI  I  I  S(A-\i:i;i!ll.l.   ASH  HI  sll. 


8X9 


T'rvii:  I.XXIV. 


Fi;r.  1.   ('ivili'inniii  iihiiHKii-nhi  \'«MTill  iiml   I?ii>li.  ]i.  mmI.      I'.xtfiini'  nt'  liulii  vijIvi-  hI'  a 
yniitin' s])eiini('ii  Nil,  7>*!K>ri:    x  'K 
'J.   Miiinii  III  riiiihiom  t,hA\'rvyH)  \i-r\\\\  :\\ii\  l'.u>li.  ji.  M  1.     lAtn  lur  ui' i  i-lii  viiUc 

of  s|M'(iiiicii  N(i.  r>'_'.'il  I ;   X  iiliiiiit  s. 
;<.   Viirdioiiiiiii  jii  riofilriita  l);ill.  |).  Mi!',      liilfiinr  uliiulil  \:il\r  nT  M|iiTiiiii'ii   Nu. 

7Hi»H:$;   X  !t. 
■I.   ('iiKiiidiniii,  mihtorlii   (Siiisi,    ]t.  ,S(MI.      llin<;c   ni'   1.  H    wilvr    ,<{'  vjk  riiinii    Nil. 

."il.'."> I ."» ;    X  M.     'I'liriic'il  ii|i  1(1  slinw  ]i(i,stfrinr  timili. 
"i.  Tlio  Niiiiic.     Iiilrriur  (if  t  lir  siiiiif  \  al\  c;    X   I   . 
ti.    ('iispiihiiiil   I'liriiiOKil  Nfrrill   and    l!tl>li.  ji.SOH.      Iliii;;p  iil'  Imtli    \;i1\in   dl'  t  \  pr 

sjicciiin'ii  No.  "NJUI!;    X   I'.      11"'  i'i;;lit  \alvf  i-.  liaillv  liroKrh. 
7,  diKiiiihiriii  iirvlica  (M.Siir.s)  I'a'l.  |i.sn;;.     Iiiiim>  nl'  a   Idt  \al\i'  liuni  -taiiim 
7(i;    X  11. 
Miimiiia  limiiliilii  !)all.]>.Xll'.     Oms.il   view  ot' s]irciiiicii  Nn.!!>!|7l;    :<  !•. 
('ic^piiliiiiii  jiiirva  ^'(■^rill  and   I'lnsli,  ji.  Mil.     llin^c  dl'  lioth    \alvis   df  iNpi- 

.spt'cinuMi  from  station  L'L'dli;   X  lid. 

Citspidovid  Jdmilliinii  iM.Sars)    liall.   p.  7!l!'.     llini^i-  of  liutli  \al\i'.s  of  s|ii(i- 

incn    No.  ."ilL'!l2;     X   "•'•.     Ix'fsilinni   and   ossidf    aic   atlailicd    in    llic    iii;lit 

\  al\  ('. 

('iinliiiiintii  iirmiiiii  \'t>riill  and   HmnIi,  ]i.  SO'.t.     Ilinjic  (if  Imili   \al\c>  (if  tv])!' 

siiccinicn  No.  1 1  iritj;  X  --.     h'l'siJinni  and  os.sicle  at  t.icln'd  in  tlu'  left  \  al\ c 


8, 
!». 

1(1. 


11. 


I'l.ATK    I.XW. 

Fij;;.  1.    f/imnjinin  «u'««/«  (l'liili])])i ),  ]i.  Mti.     Ilinut'  ot'   riitlil    salve   cf  s|ic(inwn    Nd. 

7t;;Jl'0;    X  0. 
'J.    I.iiiii>})nin  iitVni'iH  \'ciiili.   ii.Slii.      Ilinjfc  (it'  linlil  Nahc  of  N|ic(inicn   .\(i.  Hnl'!I; 

X  !». 
o.    l/uitopsiH  (iiirild  ( iiiucilii ).  ]i.  ^Jti.     I  linjjc  ot' a  liulil  xalvc  from  slat  inn   ;.';>H."); 

X  aliont  11. 
•1.    l.iiiiDji.sia  iirii/iiiidirolii   VtwriU   and    lin.sli,  p.  MI7.      llin!.;c  ol'  iii;lii    \.il\c  of  a 

yonn;;  spt'cinuMi  No  ."iL'llO;    X  '•'. 
Ti.   I. imi>pnin  jihnin  yerTill,  Y>.><\i\.     lliiiuc  ol'  rinht    \  alvc  of  Hpcciincn  No.  H.-iUliX; 

X  !•• 
ti.   CiiMpidiiriii /ntlmia  N'eniil  and   ISnsli.  ji.  .s();i.     Uin<;i!  df  Ikii  ii  \  alx  »■>  df  l ypo 
specimen  from  station  X[y2;   X  !•• 

7.  Ciispldaiia  ohcHU  (Lovi'n)   Smith,  ]i.  Sni.     lliiiKi'  of  riylit   \alvc  df  specjiiifn 

No.  IS!t()7;   X  !t. 

8.  Cimpidaria  pcUiicida  (Stimpson)   Verrill    and   l!n-h.   p.  mi."..     IIuilic   of  I'ntli 

valves  of  Hpecimen  No.  ■tHit77  from  (irand  Manan  ;   x  -'J. 
0.   Ciispiddria  (iliicitilis  ((J.  O.  Sars)   l»all.   ji.  MH).      Hinye  of  ri:;lit   valve   of  a 
fully  grown  .siioeiun'ii  No.  I9()3J  to  show  tniueaieil  end  of  tooth;   X   It. 

I'lAir,   LXWl. 


Fig.  1.    J'oroiiiyii  sithlvrifi  \'(!rrill.  variety  iniirodoiila  l>ali.  ]i.  Si;;.     Ijid  view  ol'  rii;iit 
valve  of  specimen  No.  52533;   X  3. 

2.  The  sanu'.     Interior  of  the  same;   x  3. 

3.  Cardionnin  (jhipln  ]5nsh,  p.  SKI.     llin'^e  of  riuht  \  .aixc  <il'  an   .idnlt   >pi(imen 

from  stati(m  --'UW;   x  22. 

4.  Mijoiiira  fjVi(niii'u\\'V\\\\.  ]>.  811.      Hinge  of  riglit  xaixcdf  I  \  pe  s)ii(inieii  No. 

352.-).");  X  U. 

5.  The  same.     Exterior  of  the  same:    x  lA. 

6.  Cuapidaria  rcM/ric^sa  ^'e^ri^  and    I'nish.  p.  Sd'i.     Intiiidr  of  a    Icit  \al\e  No. 

78783 ;  x  3. 


I'i...  7, 


i'i!()(  i:i:iii\as  nr  the  satiosm.  musi:im. 


VuL.  XX. 


Ciirdiiimjid  ijhjlitil    Pilsli,  p.  HIO.      IIillt;i'   iil'  ))ntll  v;ilvcH  lit'  :l    VOllDi;  Np.-ciliic|l 

N...  :r.:;(;j;  x  I'l*. 

>*.   (iiHiiithitid  iiiUiirida   iStiiiipsoiii  Vfirill  iiml    I'>u>li.  y.  Nd.'i.     Iiilrrini   of  It-ii 

v,il\  r  of  Hpfciiiii'M  \().  ix'.i?";   X  !-■ 
•1.    /,'((//( (/<()•<'((  ((/'//-""'riMii  X'crri!  I  and  Itiisli,  p.  M;>.     liilerinr  nl  lil'i  \  iihc  (ii'.>4piii- 

iiKM  No.  7x7!t:5;   x  •!. 

I'lvir.  LX.WII. 

I'iy,  1.    Munimii    iulhtlit    liiiwsoii.   |i.    77X.       Hiiini'  (if    ImiIIi   viilvrs  <it'  siifiiiiieii    No. 

."iL'lL'H;   X  "i*. 
•_',    VoliJidhi   /(«i(/(i  1  Lov.n)  V. Trill  iiml    ISnsli,  p.  Mil.      lliii^r  (if  riylif  \  ahr  di 

spcciiiicii  No.  7:il7:{;   X  iilioiit  1I5. 
;i.    )'<ililivllti  xiilKiiiiiiiltild  Vcnill  and  liiish.  p. Mm.     Iliiinr  ni'  left  \alvi(ir  tvp.- 

sprriiueii  frmn  station   Itl  llacln  ;   x  almnt  i;i. 
I.    riini)i(li)-iit   tiirfiida  N'crrill  ami   I'liish.  p.  7!t!'.      Inlfiior  ol'  Idt  valve  ni   lypc 

spi'ciiiu'ii  No.  7!^7H!I;   x  1. 
."i.   Miioiieni  [?)  prrtitiHii  Vi-rrill  and    I'.iisli.  ji.  STJ.     I'.xiiTior  nt'  a  Ict't  vahc  I'idni 

istuition  2(i.'i5;   X  1<». 
»;.    lUithijui-ca   jiiiliiiirithiidvn  (ScMcclih  Koliclt,  varirtx   ^iiitrnliiinnilis  Sais.  p.  s  l.'i. 

lllniri'  of  1,  It  valvf  ol'spiciinc'ii  No.  711  Hi;   X  1". 

7.  ri(«/(;(/",(riV(  j)((r  (I  \'cnill  and   r.usii,  j).  SOI.      Intcrioi-  of  iii;lit  valve  of  tyiic 

speeinieu  from  station  JliO)?;    X  aliont  '_'(?. 
S.    /,'((//((/((;■(•(/ flH()m((?«  Yen  ill  and  ISnsh.  p.  M  I.       Ilini;e   of  riulit  valve   oitvjie 

.speiinuMi  No.  7I0S1  ;    X   li>. 
i».   CdrdioDijiit   iil'iinxirola  Verrill  and    Husli.    ji.  siKi.      Kxterior  of  let!    valve  of 

speeiiiion  Xo.  r)2lUM!;    X  <>L 
1(».    Ifiiliiiiiiiiiiilia  shinttUd  X'errill  and  Hnsli,  p.  SIO.      Kxterior  of  .i  lij^ht    valve 

from  station  I'ti.").");  X  K'. 

I'LATI.   L\X\  III. 

Fi^'.  1.    Tindaria  call  i  si  if  or  in  is  Veirill  and  I'luwli,  ]».  f^Sl.     Exterior  of  rii;lit  valve  ot 
typo  upeeinieii  No.  ."cTiUl!;    X  •>. 
:'.   lidthndrcd  iirn/iiiidicoln  C  Verrill).  [>.  Sit.     Interior  of  ri<;ht  vahe  ol'  speeiuirn 
No.  oL'ni;  X  (i. 

8.  Ciisjiiddrid   itiid  ild  Verrill.  p.  70S.      Kxterior  of  li^lit  valve  of  specimen  No. 

52.5 17 ;   X  2. 

1.  The  sann\      Horsal  view  of  the  same  specimen. 

,"i.  MicroyoUlid  rnjiilaris  (N'errill),  p.  8ti0.  Kxterior  <if  left  valve  of  type  speci- 
men No.  :^S120;   X  20. 

ti.    The  same.     Interior  of  ri;;bt  valve  of  the  same  specimen. 

7.  l.iiiiopnin  niinnia  (' i'hilipi>i ),  p.  Sll).  Interior  of  ri.nht  valve  of  Hiieciinen  No. 
7i):!l'0;    X  i. 

S.  YoldiiUa  disKimilin  y^iVi■U\  and  i'.nsh,  p.  S72.  Kxterior  of  left  valve  of  t,\pe 
specimen  No,  :>s416;   X  1.". 

1'I.ATK     l.XXIX. 

Fi-;.  1.    I'eriplomd   lUKlnlald  Verrill,   p.  S2 '..      Ilingi;  <if  l.'ft  valve  of  type  specimen 
No.  44840;   X  7i. 

2.  VoldiiUa  mi)iii8cnla  Verrill  and    ISnsli.   p.   S70.     Kxterior   <if  ri-ht  valve   ot 

specimen  No.  ;->s41.r>;    X  12. 
H.    Yoldiclla  iHCon82)icHa  Verrill  and  Uusli,  p.  stW.     Kxterior  of  right  valve  of  a 

specimen  from  station  047;   X  0. 
4.     YohUdhi  jYujidd  (Torell),  p.  872.     Interi.ir  of  left  valve  of  a  sp.'cimen  from 

station  043;    X  IH. 


NO.  1130. 


i>i'i:v-n\ri:i!  \iiu.rrsr.i—ri;iti,-!r.r.   ixh  nrsn. 


Sf»l 


10. 


Yoliliillii  innniMiticiiH  ViTiill  ami  IIiihIi,  i>.  mUI.      IiiifiiMi-  ,11   lift   \,il\c  da 

spcciiiicn  from  stiitimi  !M7;   X  1.'. 
)uliHillii  >it(l),ni'iiiliitii  \'i'nill  iiiifl   Iliisli.  ji.  ,Ml."(.      I'.Mciinf   lit'  liylii    miIm-  ot' 

tyjic  Mpcciiiifii  from  Htatiou  lii  lliuln  ;   x  "i. 
YoliliiUii  miinisciilii  N'i'rrill  .mil  I'lisli,  ji.  s7o.     Iiiti'iinr  nf  Id't  \iilvi>  nl"  M|ifi'i- 

moil  No.  ;>M1.'>;   x  '22. 

I.rilil    hilHhiilllil  \'r\ii\\    ,i!iil    .<liiitll.  |i.  H.'il.       i'.Xti'liiir    ol'    li-lil     \,il\i'    nT    l\|ii' 

>]iiTimrii  No.  S,")"!!'.! ;   >;  ii'miit  l>. 
('iiHjthUn'm  liiriiiO!<ii  \'criill  ami   IiMmIi,  |>.  Si'li.      Iiiii"ior   of  hit    \al\i'   ol'  t\iif 

spii  iiiit'ii  No.  7s;]ll{;   X  H. 
Mmli  s'\i  Uii  I'ltiijiVis  N'firill  ami  nM>li.  p.  777.      Kxtfrinr  n|'    iii;Iit    \al\i-  nT  a 

spcciimii  t'ldin  iH'.ir  station  l,',jtlt>;   x  ••. 

I'l.Air   I.N^  \. 


rii;.  1.    YoUl'oUii  irin  \'crrill  ami    KiihIi,  varit'iy  siriitu  N'cnill   .iml  liiisji,  p.  ,st;|.     l',\- 

ti  rior  of  1  i'.;lit  \al\('  ol'  t>  jic  spi  riiiiiMi  No.  7IH-r>;    X  aliout   11!. 
2.    VohlifUii  I'cif  \'t'irill  ami   iliimli,  p.st;;!.     InliTior  of  ii  jrfi  valvr   I'lmii  statjuii 

WC;   X   11. 
rt.    Volilhllii  Iik'hIk  iI,o\i'ii>  \'rriill  ami   liush,  p.  stll.     I",\ti'iior  nf  Iri't  vaKi'  ot' 

spcr'.    en  No.  7ltl7l!;    X  alioiii  tlA. 
I,   .lilniih   III  luslii  \'('i  rill  ami   jliisli,  ]».  S^>X.     Iiitfiinr  u|'  ,1  Irii  val\  t-  ironi  siiMion 

L'l.'.O;    X  11. 
.">.    YoUliiUit  /iiiliriiii   \rnill   and    Hush.  |i.St)7.     Mxtfiior  ul'  lett:  valvf  of  typi> 

sjierimcn  from  station  !II7;    X  alioiit  \',\. 
t).    7V/((?((ri((  (7///i.s/;/'((r))M'.'<  Vrrrill  ami  linsh,  p.ssl.     Ilin;;!' ot.' rijilii  \  ahf  of  t ypr 

.Hpt'cimcii  No.  ."C.'iliti;   X  X. 

7.  Tlio  .saint',     'rniiic.l  up  to  show  sliapc  of  tcitli. 

8.  Yiihliilhi  iiitliila  Vt'Mill   ami    liiisli,   it.siU.       Mxtcrior  of   hl't    valvo  of  typo 

spccimi'u  No.  SN117;   x  aliont.'>A. 
!t.    YohUiUa  leiitiriiht  (MoUei)  variety  (n/i/i/io  N'eirill  ami  ISiish.  p.  SCi!.     I'.xiciior 
of  1  >ft  valvo  of  a  spctinien  fioni  st.itiou  IHti;   x  Id. 
Xeiloiiillii  s  II  ho  rut  a  \'orrill  ami    I'.iish.  p.H7X.     Kxiorior  of  I'-lt  v.ihi-  ol' sin-ci- 
nii'U  No.  3l82h;   x  11. 


10. 


PiATK  i.xwr. 

Fi;;.  1.    r.cilella  piirni  \'iTrill  ami    lliish,  p.  s.")7.     Iiitfrior  ut'   a  liuht  \al\i'  No.  7.'<l'iti.">; 

X  2."). 
2.  Xiiciiht  firaniiloiu  \'errill,  p.  S,")l>.     Min^rc  ol'  right  x.iivi-  of  ty[ir  spi'iinu'ii  No. 

38451;   X  ahont  Iti. 
'^.  Xiimla  ciiint'llittii    .lolVrcys,  p.  S.'il.     Hiiitjo    >!'  right  v.ilvc   ol'    spfi-init'ii    No. 

l.")79r);   X  iilioiit  13. 

4.  roldiiUa  hnti  Ilia  CSlnWov)  y.irlety  amhii'i  \'iri\\\  ami  linsh.  j).  .'^Oii.     Intorior 

of  a  right  valvo  from  station  ist!;   x  ll.'. 

5.  YoJdicJJa  Jeffrcjixi  ( liid.aigo),  p.  8tJ<i.     Interior  of  right  \  alvo  of  sfiocimon  No. 

78a")S;   X  ahont  13.  • 

f>.  Xiiciila  proximii  Say  (f)  varioty  ovuln.  \'orrill  ami  Knsh,  ]).  x.'iL'.     Hingo  of 
right  val\o  of  spocimcii  No,  7.'i4ti7;   X  about  10. 

7.  LuliUa  mcHSiincnHis  (Scgnoiiza)  variety  Kiihleria  Vorrill  antlMiish.  p.  s.")i).     llingo 

of  left  vahc  of  spocinnn  No.  :!.">l.'lL':    x  about  1(5. 

8.  Xiinilii  siiboriita  \'eiTill  ami    Miish,   p.  852.      Interior  of  lel't  v.ilvo  of   tyi)c 

speoiuien  No.  40174;   x  about  13.     Showing  rosilinm  attaclieil  to  jiit. 

9.  I.aliUa  Hifs.sd »('««/»  (Sogneuza),  p.  1^5;.     Ilingo  of  loft  valve  of  spooimon  No. 

52156;   X  about  16. 


Nf 


892 


-3^...a  x^^sifirsmassemmm 


ri;nri:i:itix(,s  or  r/ir:  x.itioxai.  misffm. 


vol..  XX. 


I'r.ATK  l.XXXII. 

Fi^.    1.    I.cdn  tniKhihi   i  Doiiovnii  i.  ]).  SV,.      IntiTioi'  oi'   rii;lit  v;il\o  (if  spcriiin'ii    Xd. 

;!H2()5;    X  lilioiit  5;. 
•J.    /.('(/((  7)r/'>i» /(MMiilli'i  I.  p.  S.V).     Iliiiup  (if  rio-ht  \-;ilve  (if  siiccinicii  Xo.  7;!it77; 

X  iihoiit  ."li. 
;{.   XiilDiirlhi  siiliimdii  A'crrill  iin.l    Hush.  p.  87s.     Hin-c  of  l.'ft  v;ilv(' of  sjicii- 

iMcn  \(i.  ;!i;!2tl:    X  iilidut  10. 
■I.  'I'll!'  siunc.     'I'linied  nji  to  show  shii](o  of  Icctli. 
").    ]'ol(li(lla  iiijlatd  \  onill  mid  liiisli,  ]..  MM.     Iliiio-,.  of  a   ],.fr  valve  Xo.  ;i,V.7.-,: 

X  about  10.     Turned  up  to  sliow  slmjie  of  teeth, 
ti.    rile    . 'Hue.     ]■' rout  view. 
7.    )'iiUVi(Ufi  dinniniiris  Veirill   and    I'.ush,  ]i,  ,s7i>.      lliuye   oif    a    left    v;il\e    \o. 

liSIUI;    X  I'O. 
S.    )'o!(li(n(t  fraierud  VvrrW]    iiiid    I'.nsh.  ji.  ^17.      lliu!;c    of  li-lit  valve  of  i y],,. 

s]i('(inien  from  station  ill7;    X  -'0. 
9.   Laid  himhiann   \'eriill,  p.  S.'il.     Tlin-f  of  hoth  valves  of  type  .s!)e(iinen  Xo. 
;!."i7-'lt;    X  ahout  (U, . 

10.  MdUctia  polifn  Vcirill  aud   Hush.  ]>.  87(i.      llin.ue  of  a  left  valve  Xo.  787!tL': 

X  ab(.ut  ()L     Some  of  the  teeth  are  hrokeu  away  Just  liohiiid  the  heak. 

11.  Yiildklhi  iris  \'errill  aud    IJush.    j..    SOS.      lliaric   of    left  valv(>   of  a  y.mui; 

sj)eeimen ;    X  20. 

ri,.vTK   LXXXIII. 

Fiy.  1.  CrriieUa  J'nt</ili.i  Verrill,  ]i.  817.  Interior  of  ri,^'ht  valve  of  t\pe  speeiiuen  Xo 
Xo,  1154:);    X  ahout  I!. 

'J.  Thesauie.     llin.uo  of  another  larger,  inijierfeet -specimen  X.i.  I(m;7G;    X  ahout  S. 

S.    YohUiUa  JefireiiHi    (Ilidalyo^   p.   SiKJ.      Kxterior  of  a   left   v.alve    Xo.   7sa"8: 
X  ahout  IS. 

•I.   Limopsix  i)i(>/iniiiii()hi  Verrill  and  ISush,  ]>.  S47.     Interior  of  a  rij;ht  valve  of 
a  young  specimen  Xo.  SSI  IS;    x  about  S. 

.").  Xiiriil(t  mihorata  Verrill  and  liush,  p.  SM'.  Kxterior  of  left  valve  of  type 
speciuHMi  X'o.  40l7t);   x  about  IS. 

fi.  -/7'rrt /«)».'/;<r////8  (Seae(^hi)  \;iriety  unurinnia  Verrill  aud  IJush.  ]>.  77s.  Inte- 
rior ol'  right  valve  of  si)eciinen  Xo.  r)L'17(»;   X  about  S. 

7.   TJie  same.      Hinge  of  both  valves  of  the  same  specimen  ;   x  about  S. 

l'i..\Ti:  LXXXIV. 

Figs.  1    and  2.   ChlanniH  hi'iirtUcli  XvrriU  ami   Ihrsh.  ]!.  SS4.     Kxterior  of  lioth  valves 
of  a  young  sjieeimen  foiiml  among  I'oraminifer.i ;    X  20. 

Pi  ATI-    LXXX\. 

Fig.  1.  Ci/clopecfen  hptdhiis  \errill.  ]>.  SSO.  Tortiou  of  upper  or  left  valv(^  of  type 
specimen  Xo.  SS41S  to  show  character  of  sculpture;   x  10. 

2.  Cycloprcteu  ixtiitis  Verrill  and  liush,  p.  8S7.  Kxterior  of  lower  or  right  va]\t^ 
of  a  young  specimen  from  station  220.">;   x  •">. 

S.  The  same.  Kxterior  of  h  ft  valve  of  a  larger  siieeimou  from  the  same 
station ;    x  "). 

I.  The  same.     Hinge  of  tlie  same  valve;   x  13. 

."I.  r'l/clopccloi  j)usti(l<mii!i  ^'errill.  p.  SSii.  Portion  of  left  valve  of  sjieciineii 
Xo.  4S7*>."'i  to  show  character  of  sculi)turi' ;   X  10. 

(>.  Tile  same.  Piece  of  a  left  valve  of  another  sieMinu'ii  Xo.  487(il  to  show  vari- 
ation in  form  of  i)nstnles:   x  about  IS. 

7.  ('innploiifctin  (/rii  n!(iii<lic<(  (Sowerh\  i  \errill,  ]>.  SS7.  I'xterior  of  right  \alve 
of  siiecimen  Xo.  78S87;   X  •">. 


I 


I 


Kii 


J 


NO.  1130. 

Fig.  X. 


DEEl'-WATER  MOLIASCA—VERIULL  ASD  liU^H. 


893 


10. 

11. 
Fijj.  1. 

3. 
4. 


n-.  1. 


Fig.  I. 


CtjcUipviiiii  Kuh'tnitiv'it'ir  XvYvWl  iind  liu^li,  ]».  Sl(».  I'lirtioii  dl'  left  v.iKc  of 
spcfiiiieii  No.  isTlL'  to  .show  cliaracter  ol'.siiil|ituit' ;    x  10; 

The  saiiic.  Exterior  of  left  valve  of  sjieciuieii  No.  lM7t!<>  from  oil'  Nova  Scuii;i, 
ill  li)0  ffitlioiiis;   X  :!. 

<'il<Iopt'cU:n  ihisIiiIdsiis  \"('irill.  ]i.><)'«0.  I'.xteiior  of  left  valvi-  of  tyjie  s]ieciiiieu 
No.  ISTlil;    X  ;i. 

'riie  same.     I'xteiior  of  liuht  valve  of  aimtlier  s])eciiiieii ;    X  '■>. 

I'l.ATi:   l..\.\.\\  1. 

Suleniya  grandis  \'eirill    and    Hush.   p.  xXTk      Kxterior  of  left  \al\e  ol'   typo 

wpeciuien  No.  ."'ill51.''>;    X   11. 
The  .same.     Inteiior  of  ri<;lit  valve  of  an  imperfect  s]ieeiiiieii  No.  lOlOli;  x  lA. 

Kpidi'rmal  fringe  re-stored  from  other  specimen. 
Cri/ptodon   {Axiiiiilu>i)  pijiimnus  Verrill     iiid    I'liish,    p.  TIL'.       Exterior  of   left 

valve  of  .s|>eeiiiien  No.  7S3(!S  from  station  liiiHT;    x  '2-. 
The  same.     Interior  of  right  valve  of  a    smaller   specimen    iVom    the    samo 

station;   X  '2-2. 
Xiiciild  iimvilldta  .Icllreys,   p.s."j|.     I'.xtcrior  of   Icit  valve  of  s]iecimei)    No. 

I.">7IC);    X  12. 
('hhiiiinn  costilhitii  X'erriil  and   Hush.  p.  M!."i.     I'.xtcrior  ot'  right  valvc  of  tvpc 

sjiecimeii  No.  .jl.'l71 ;    X  0. 

l'i..\ii:   I.XX.Wll. 

Porotuiid  ,s('///c((N  X'eirill.   \aricty   micnidiiiila    l)ail.  ]>.  si;i.     IiiiiL;e   ot'  a    left 

vidve  No.  7.S71IU;   X  •">. 
/'(•/•//('(>/•(/(((  !ir<titiitiji ra  (\errilli  Hall,   p.  Slti.     Iiilerior  cd'  a  left  valve  (typo 

S[iecimen>  No.  llSoS;    x    I. 
/.^/o»,si(7/((  .s(/^(;  7(((//'((/((  I  .letirexsi.  p.S17.     Interior  tif  u  left  valve  No.  7SS00; 

X  10. 
I'cripliiiiui  tiljiiiis  X'errill  and   riiisii.  p.  SL'L'.     l.xteiior  of   right    \alvc  of   t.\  i)o 

specimen  from  station  (S7I>;    x   t. 
I'erijiloiiKi  iiiiiltihtta  X'errill.  ]i.  (Sl'LI.     Kxterior  ol'  left  \al\e  of  tyjie  .si)ccimeu 

No.  IIS  10;   X  1. 
I'roptumimiiini  thiiUi8siiiii,n  (l)alli   Verrill,  p.  Sll.     I'.xteiior  of   uppir  or   left 

valve  of  a  spceimeii  from  station  !M!I;    X  1<>. 
t'fjiptodon  ( Aj'iiiiilug)  J'trnKjiiiosiix  (Forbes),  p.  7iK!.     Interior  ol'  right  valve  td' 

•specimen  No.  olStiO;   X  1-'. 
The  same.     Interior  vf  left  \alve  (d'  the  same  specimen. 

I'l.ATi:  I.XXWIII. 

Cnjptodon  croulhufisis  (.letlreys)  Smith,  variety  alius  Verrill  and  Hush,  p.  7S7. 
Kxterior  of  a  left  valve  from  Kastjjort,  Maine,  liSTO;   X  ahoiit  X. 
'2,  The  same.     Interior  <d"a  right  valve  from  the  sam-^  locality;   X  abont  H. 

3.  Cnjptudoii  jthviiin  X'enill   and  IJnsh,  p.  7s8.     Interior  of  left  \al\t'  of  type 

si)eeiMion  I'rom  st;ition  l'.")l ;   x  M. 

4.  The  same,      {exterior  of  right  valve  of  the  same  K]iecimen. 

5.  Xiifiila  j)ruxituii  S.iy  (?)  variety  oratu  N'errill  .ind  Hush.  p.  K")2.     I'.xtcrior  of 

left  valve  of  speeinion  No.  73lli7;    X  alioiit  12. 
(!.   Macoma  iiitia'-  liavvson.  jt.  77S.     Kxterior  of  left  valve  id"  s|)ecimen  No.  .'>J427j 
X  3. 

7.  Kitinerlia  hrerin  \'errill  and  Hush,  ]».  SiM.     <i.   I'.xtcrior  id'  left  valve  of  speei- 

luen  No.  40232;  b,  interior  of  right   valve  of  another   specimen  No.  I.">.SS4; 
X  4. 

8.  Xiicniu  uraiiiiliiKd  Verrill,  ]>.  8,'")3.     K.xt<irior  of  left  valve  of  type  specimen  No. 

38451;   X  about  20. 


894 


I'UdCKEUlSCS  (IF  Tin:  x.iTiox.n.  .vrsiii  M. 


ViiL.  XX. 


Praf" 


I'l.ATi:  1,.\.\.\I.\. 

V'\'fi.  1.  Vnjiitiidon  ohsdh'liin  N'crrill  iiml   lliisli.  [>.  7>^!'.     I'xtcrior  oC  li^lit  v.ihe  of  a 
ispeciuii'ii  IVuiii  .st:iti(>n  !M!l;    x  alMnil  L'o. 
1.'.  The  saiiR'.     Interior  nt'  lilt  \  alvc  nl'  tin   saim   spiciiniij. 

;<.   Lcjitu.iiniiii  tniinihix  Xviv'iU   ami    iiii^li.   ]i.  ~\*~.      lliii-i'  of   k-l't    vahe  of  type 
spei'iiiiiii  No.  iriliSl);    x    I"'- 

4.  Till'  .saint'.     Iliiiiif  of  ri^ht  vah  »•  of  the  sann-  s])cciincii. 
").  'I'lie  same.     Interior  of  llie  same  valxc  :    x  ;>". 

().  Cr/ipldddU  iiliciiluH  X'errill,  ]t.  ~!*i>.     interior  of  left  \alve  of  a  younj;  specimen 

No.  IISL'ti;    X  'J. 
7.   <'r;ipt<)(loii  [  .t.rhiiili('<'\  hieria  \'(.'rrill  and   Iinsh,  p.  Tltd.     llxterior  of  leli  \al\e 

of  lyjie  specimen  from  station  l2-I(W;    X  :il'o  it  -'2. 

5.  The  .same.     Jut  lior  of  ri^-ht  val\  e  of  the  .same  s|ieeiiiien. 

1'1..\T1.    XC. 

Fiii'.  1.   (  riiptndoH  (.Lrhuiluy)  incijiKdi-s  \errill  and    15nsh,-  p.7!'l.      Kxteiior  of  riulil 
valve  of  tyjie  si)ecinieii  from  statioes  li^-idl;   x  ahoiit  UK 
'2.  The  same.     Interior  of  left  valve  of  the  same  specimen. 

li.   ('rijjiludiin   rroiiliiuiifiiti  (.lelfrevsi   fsmith,  p.  78(1.     Interior  of  left   \al\e  of  a 
speeimeii  from  stations  ()2-(i.") :    X  aljont  II!. 
The  same.     I^xterior  of  riuhl  \alve  of  the  same  Hpecimen. 
.tjiiiiidon  t  lliptii'iin  \'errill  and   Iinsh,  p.7!Mi.     Mxterior  of  right  val\e  ot'  t'.  pc 

siieeimeu  No.  I!")]".") :    X  ahoiil  \',>. 
The  same      Interior  of  lel'l  valve  of  the  same  >iiccimen. 
I'dlhiiiid  /(rrHtjiiioKii  ^^l(mtagn),   p.  78:>.     Interior  ot'  lelt   \  ah  e  oi'  s]ic(  iiiien 

No.  lir>SS;    X  I'd.     (/.Cartilage. 
The  same.     Interior  of  right  \  iih c  of  the  same  specimen. 

I'l.ATi:    X(  I. 

('ri/ptiKloii  iiiSKjiiis  \'errill  and  Bush.  p.  ".*'•''>.     Interior  of  a  lett  \alve  No.  .").'733 

tVom  station  L'lltt);   X  ahont  li. 
The  same.     I'.xterior  of  a  let'i  \alve  from  the  same  station;   X  ahoiit  U. 
AIinitmiiiK  trhitnlia  Verrill  and  ]$nsh,  ]>.  78J.     Interior  of  right  valve  of  t.sjie 

specimen  from  station  21507 ;   X  -I- 

1.  Mdiitiiiiild  vitiietilti  Verrill  and  Hush.  j).  7sl'.     Exterior  of  right  valve  of  a 

specimen  from  stat ion  Jl'7S;   x  17. 
").  Ci-jiplodoii  ((iiialix  \errill  and  Hn>h.  ]).  7><X.     Hinge  of  both  valves  of  a  speci- 
men from  station  IS  IUuIh  :   x  ahont  .">. 

6.  Tiie  same.     Exterior  ol'  left  valve  of  siieeiineii  No.  7i:>02;  X  aliont  .">. 

7.  Cniptodon  (Ariniihtti)  orittim  \errill  and  IJnsh,  p.  7!.t3.     Interior  of  left  vahf 

of  type  s])eeimen  from  station  !l|!l;    x  li"). 
i<.   helliellii  tiitida  Verrill.  p.  778.     Interior  of  left  valve  of  speciiueu  No.  .S71I71; 
X  11. 

ri.ATi,  XCII. 

Fig.  1.  .h-inodon  (lliptiviis  ^'errill  and  Bush,  \\.  IM.     Hinge  of  left  valve  of  type 
s]teeimen  No.  IJan.");   X  ahont  l'(!L 

2.  I.imopxin  Hiilcuta  \errill  and  llnsh,  p.  845.     Interior  of  a  right  valve   from 

station  21!n);   X  4. 

3.  Criiptudoti  (A.rinnliix)  Himphw  \'errill  and  Bush.  p.  7!U.     Hiuge  of  right  valve 

of  type  speeinieu  from  station  10!t3;   X  about  13. 

4.  Tho  same.     Interior  of  left  valve  of  the  same  speeinieu. 

5.  .Lvinopsia  iirhinilala  Sars.  variety  iiuuiutilix  \errill  and  Bush.  p.  7!I4.     Interior 

of  left  valve  of  type  speeinieu  from  Eastport,  Maine,  1872;   X  about  13. 


Fig.  1. 
3, 


«r 


Fig. 


NO.  Ii:i0 


ii/:j:r-tr.iTi:i;  Mni.n'siA—i  ki:i;u.i.  asi>  m  sii. 


SI  I; 


) 


Fiii.  (I.    Tilt!  . sunn-.     IliiimMif  liotli  valvi's  of  the  siiiui' sitcciiiiiMi ;    X  atioiit  !.'(>. 

7.    Motihicidd  hiiliiildtd    ( Mont iiffiu    viiri<'tv    tenuis    \fnill     iiiid    I'msh,    p.    7"!'. 

liitfi-ioi  111'  ii  lijrlit  \m1\<'  froii!  stjitioii  L'l.'77 ;    X  nlioiit  111. 

S.   Montiiiiild  hiilnildlii  {Mimtn'^n^  ynr'ivty  friuiUiH  \rn\\\  mid  Hush   ]l,7^tl,     Inii'- 

rioi of  a  liiilit  \iilvcNo.  Iiilol;    x  17. 

II.    Moutdviitd  "laid  .lotVicvs.  \>.  7M.      Iiil('ii((i-  ola  liulit  \alvf  No.  ItiLiti;  x  -U. 
10.    riu'samc.     Interior  ol'a  left  valvo  No.  I(ii;i7:    X  I'H. 


t  L 


l'l..\TK    .\('I1I. 


«« 


I'i;;.  1.    ('riij)liiihni  {  A.riiiiiliit)  oratiix  WmtIII  and  liiisli.  ]i.  7'.i.S.      lliiii^c  ot"  liotli   \ahfs 
of  t\j)i'  siH'ciiiicii  from  station  iUH;    X   !•"). 

2.  KilHopnis  chvdtd   (Siinipson>  NCrrill    and    iinsh.    p.    7M.       lliii^f   nt'  ,i    liylit 

\aivi' No.  7K>:);!  I'lo  n  \ausli(ni :  x  l<i*.     <{,    U'csilinni  and  ossi(  jr. 

3.  Thf  .same.      llinye  of  anotliiT  right    \al\f  iVoni   tlic   same  station,  to   slio\v 

vaiiation ;    x  I^D. 

I,  Tbe  .same,      llini^eof  liotli  valve- of  anotlier  speciineii  from  the  same  stat  ion  ; 

X  ;!!'. 

5.  Moiildtidd  ciiiicdtd  N'eiriU  ami  ISusli,  |).  7>'-'.  llinue  of  lioiji  \:il\i'-.  trom 
station  l''J7S:   x  .'iO. 

li.  Moiitd<ul<t  tiniiitliild  .lefVieys,  n.  7Sl.  Hiiiiie  of  a  li  tt  \al\e  No.  H.")!!:.';  X  ;>''. 
a,  Hesilinni  and  ossicde. 

7.  Moiitdciild  hideittdid  (Montauin.  ]i.  77'.'.  llin<;t'  of  a  riulii  Nalvi  No.  7ISl.'>' 
.'Voin  Naiishon ;  x  •>". 

s.  The  same.  Hinjj;e  of  lioih  \alves  of  a  smaller  s|iei'imiii  lidin  the  same  sta- 
tion; X  ;io. 

II.  Moiitaciild  xtridluht   N'erril!  and    Iinsh,   j).  7so.     llinue   ol'  a   iel't    \ai\f    Iroai 

station  U'27ti;  X  IS".     Hinge  of  a  right  valveTrom  statioti  l.'L*7l{;   x  ;>". 
111.    h'lllicUd  nitidd  X'errill,  p.  778.     llingo  of  lioth  valves  of  s]»eeimen  No.  :>71'71  ; 
X  1-.     Right  vahe  turned  down,  hd't  tnriu'd  uji 


rt..\Tf.  xciv. 

l"ig.  1.  Moiiiaciild  tdiitiditid  .let'tVev  s,  p.  781.  Interior  of  a  left  valve  No.  :>."i|lL' 
from  station  -MdH;  X  20.     «,  ]iesiliiini  and  ossiele. 

2.  'J'he  same.     Interior  tif  a  right  valve  frinn  tho  same  station;   X  2ii. 

;{.  Kellid  siihorhienhtris  CSlnnUxixn).  \).  77!l.  Interior  ot'left  valve  of  a  spiM  innii 
from  oil"  8alem,  Massaehitsetts,  lf<77;   X  m 

I.    I'ho  same.     Interior  of  right  valve  of  the  same  sjieeiiiu'ii. 

r>.  .]fi)iitd<tild  cd^td  Verrill  and  Hush,  j).  "'^l.  ICxterior  (d'  a  left  \  al\  >•  from  sta- 
tion 2283;    X  2(1. 

ti.  Miintdiittd  h'idcntitid  ^MontagnK  ]i.77!t.  Interior  of  a  right  valve  No.  7ll)2S; 
X  ahont  13. 

7,  Kelliojisin  elcvata  (Stiinpsdii)  \'errill  and   Hush.  ji.  7SI.     Interior  ol'  a  tight 

\iilve  No.  71333  from  \anslH)n;   x  about  13,     d,  Ktsilinm  ami  ossicle. 

8.  The  same.     Exterior  of  a  left  \alve  from  tho  same  station;   x  ahont  13. 

Pi  ATK    Xt'N'. 

Fig.     1.   /-_i/o»i»i(i  ,'/»'(JHi(?//Vr(j  Verrill  and  Hti.sh,  p.  818.     I'.xterior  of  a  left  vaht-ttypu 
speeimein  No,  r)2.">61 ;   X  ahont  2i, 

2.  rfiticonlia  grdiiiili/irn  (N'errill)  Dail.  11.8II),     Hinge  of  a  lelt  \alve  itvpo 

spei'imen)  No.  4-1838;    x  8. 

3.  Tlio  s;ime.     Hinge  of  lioth  valves  of  a  fully  grown  8pe«dnien  No.  78ii7!t;    X  4, 

Turned  nj)  to  show  ossii  le.  d. 

4.  The  same.     Hinge  of  a  right  vahe  of  another  speeimen  No.  78'.t2l(;   X  t)<. 


it 


/ 


"•    'nonxirliu  runinio  \eir 


'"   ■■""'   'i'lsl,,   ,,.   ,sis 


OL.  XX. 

"   ""•  •'^^niM.  .stall,,,,: 


'^ -•  "     ■'■    "■■■« ■"■■■•-- - i „.v„.,„,,. 


•'«■■  1-    r.i,„<,i,His  s„i,.„ia  V,.,., 


i'lAii.:  .\c\I. 


-'""'■"'"*.,?,,,„„,„„„„,,„.  _,  •'  -'.I"  -m.  f,,„„ 

«      A     0. 


^'•^ !;';-"- ^'';:'nt;:;:';:-,r--  . 

,         "^■^''■';   X  K;.  •     '•''■^'^-     '"''■'""•  <'/'ri«ht  v.Iv,.     <• 

,     ,.  V/-  ^'-i-n  X.,.  ,,     ^'  ;^";  ,  '  =  -''•  V.  ^75.      rnt,.n   „'',.  ''•,.,,,^        , 

'oti,   vilv.         .•  "-'""    ■••11(1    J„sJ,  s... 


I  \  I )  !•:  X . 


[  Ilii'.icizcfl  tinurcs  ms  ^'^ 


iclcr  1(1  piijirs  wliiTr  tlin  M;unt'  is  ilciintil,  (ir  wlii'i(>  iho  ilistriliutimi  nl'  the 
sin'c'ii's  in  L;i\  I'll,  i 


AliiM 7Ti> 

li.lii;i,'iillis 778 

vMi'.  aiiii'iiiiiiiii r.V 

All  I  ana (<85 

Ailiaiiilla 77(i.  \.7V,  885 

I'asia v:v 

.TCiiiiipfctcn.    iSn'olxo  I'l'i'diii v.;(),s;;3 

iiTaitiaiis >*'M 

iipi'l'riilarirt 8:ill 

Aiinisimii.     {S,r(iln(i  rrcli-in S.'i;,  h'Jl),  SHI,  SHH 

rcm'stratmn SU 

])li-iiriiiir(ti'H >'-'ii 

s|i 811 

Aiiinsriiii|M'iti'ii  >^'S't 

liiirilii;aliMihis s  i:i 

Aiioiiiia S'J8 

Ai'r:i  ail\  i-i:<iili-ntala .«VJ 

aiirita f*4ri 

caiulata 855 

lii'teroilonta 842 

Jifrlulli'uliiillrs 845 

pi'iifiiniliiiila S44 

Arciil;!' 842 

AHtarti'  nana ."W 

A  SI  art  ilia' 798 

AxMiiiiluM 770,  r.''-',  797 

iiiipticus 7yr>.  ma 

Ax  amps  is 7V<i.  794,  705 

riiiilata 7''.' 

nrbiciilatn 702,  ,'.''/ 

var.  iniM|uali.s 7:'t 

Axiniilus.     (>■<•■•»/(")  Cryittoilon) 77ti,  ,".■«( 

Inwis 7:iii 

Axinus 784 

rripiiliin'nsis 786 

riMiMiginosus 791! 

liarliatia 842 

Uathyarca 77G,  S4J 

abyssorum S-l.t,  844 

aiioinala 84:!.  SI  I 

rnli'lin  nsis 84!! 

tllarialis .'•4:! 

ylonienila 8i:!.  844 

iniilata 84;! 

inaM|iiisrul]ita 84;!.  844 

pL'Ctiinruliiidi'S 842.  845 

var. I'lTniiljita  ...      843 

IViilei 843 

graiiili.s  ...  842,843 
orliiciilata...  84:! 
srjit  iMi  t  r  i  II- 

iialif* 8i:! 

]((il\('y  «>a 843 

Proc.  N.  M.  vol.  XX 57 


I'a^'.-. 

Ii.it  liyana  profiniiliinla i 81:1.  v;  ( 

pllTiirssa s|:! 

I'll' lit  liana 77i'i,  .-42 

ail\  I'lsiilnitata .«12 

asperiila HiJ.  S4:! 

Hfiiirinata Sli;.  si:! 

r.ornia  77'.> 

Calliirarilia si  7 

I  \'i'siciini\  al  il.'iUi f\~ 

('aiiilitnncrti's.     i  Ser  iiho  ]'i'rti-n)  ....  770.  >  .'^,  s-.';i 

ari'iiatns s'.'S 

i;iii  nlanilii.'a •<  .7 

lins , s-.'8 

.St rial  lis 828 

tiiiriiiiis s;28 

( 'anlinlavia s.'.l 

Caritiiiiiiya 77i'>,  7'.i8 

a.liyssinila m"! 

costellata 8118 

\ar.  riiipiilrlita HII8 

rlll'ta   8118 

gemma .^".'' 

glyjita v/'i 

miilticDstata 8i>7,  .Vi'V 


(irnal  issiiiia . 
piMTipstrata  . 

"]> 

striata  


Cctorhiinra. 


at\  plia 
iiitiil.'i  .. 


(,'rtllllivn 


sp. 


.'<lil 

sii;i 

8119 

81I8 

770 

^/( 

S15 

770 

s  ;.■> 

Clilaniys.    (S<'i' ahu  I'l'cti'n). .  770. .S'.V.  8:!0.  8;!1.  8;!3 

lieni'ilirti ^..'; 

ilinlDnius 8:!l,s::;8 

I'listcllata i.'.i 

islanilica 827,  s;i4 

varia 8:!4 

Cliiiri.stoilon  /  rauci'Uatus 77.^ 

f'laiisina  iruulinrnsis 78t! 

Cliiliiipliora 770 

goiiUliana 820 

iiiornata v;.7 

t  riliiii'ata 820 

Crcni'Ua  IVaKili.s vi?" 

Cryptodon 770,  :st,  785, 795,  797 

( .\  xiiHilii.s)  liri'N  i,s 7!H) 

iToullni'iiHi.s ."v; 

\ar.  altii.s rv7 

(Mlitalis 7s>i 

(Axiniiliis)  torruginoMiin r.'i.',  794 

tlfxuosim 784,  788 

897 


MOS 


niocKKDJXcs  (tv  Tiir.  x.iiKix.tf.  i/r.s/.r.u. 


Viil..  XX. 


Page.    I 

( j\  |itiiil(iii  ;;Hiililii 787,  788 

t;iiiiiilis ;i' 

(  A\iiiiiliis)  iiiciiiiali.i 7,' J 

iiisi<;iiis 7V.' 

<l)lSI>ll'tllM 7Si> 

( AxiiMiliisi  ovitlns T'JJ  \ 

]iliimr rW 

Iilicaturt rv; 

(Axiiuilus)  ]p\  u'liiii'iis 7;/.' 

siirsii 7Hu,  7Sli 

( A  \iiiuliis)  siiiiiilix ;.'/ 

•  ,sii1m)\  iitiis I'Xi 

tiirtmmiis 7',i;) 

(  ly I)t(Ml()Mti(lir 7H4.  H.'il 

'iiiMMliiiita 8511 

CtciK  diiiitidn' *>"iO 

Ciiciillariii 84'-' 

liitiiiHldiil.'i HV2 

('M(iiili-llili;i- 8.)1.88il 

Cii-iiiidariu 77li 

ilictica Klllt.  ^'^.' 

v;ir.  ;;l:iciiili>, 8iiU 

(i)ni:os;i ,vi.; 

frnliM-ii:i 801.  802.  So.! 

<lUi\.i]iti 790.  S'«/.  801,  802 

laiiiclldsa ,".'.'' 

iiifdia S'«i 

iilp.'Si! 801,  802.  803,  S'll 

liai'Vii sill 

pclliicida ^".1 

ro.st rata 709,  S"" 

,siit('i)ita sun 

tiii;;i(la 7/'.'' 

uiiil.ita 7.''S' 

vi'iit  i'ic().~ia s'".? 

Cusiiidariilii- 7."' 

('\  aiiiiiiiii  clfv  atiiiii 784 

('yci(p|ierlcii.     (Si'enho  Viiti'U) 770.  820.  ^.;.' 

iiiilirifiT 8;!2.  8:!0.  810 

keriiiadcccnsis 81 1 

Itptak'ns >■''.' 

iiauu.-< ■''■•'7 

l>iistiil()siis 8:12,  s.::i 

.■iiibimln'itV'r '^4" 

Ili'htiiJcctiMi 827 

I>i])l()di)iiti(la' 7.'^4 

Krvciiiida'  779 

l'ili|ii  s 8:::! 

Iicsiviis 8:;:! 

Flai)illi|,i.ririi 8;i:i 

llaludliformis 8:):) 

Kli'MipiM'lcii 8;!3 

lli'Miosiis 8:!.') 

Cl.iiiiida' 'Sir 

(iloiiiina' 847 

Glomus ">'.' 

iiiaiiiiilateralis '^'■'^ 

.iai)<irii<'u.s **i*^ 

jill'ioy.si **'S 

iiitcii.s 847,  s4s 

.siiiii)lox 848 

llaloiiyniplia 77fi,  798 

ilaviculata 811 

(itriafella ■*'"  ; 

Homipet'ten ■"'•'*  ; 

loi'besiauus  828  I 


I'a'.'o. 

1 1  inn  i  tcs ^  ?:,  ''28.  8:J3 

Iliiiiiitcs  i(irifs.<i 827 

Hyalopi-cliMi      (S,;'  (il.s'1  I'rctiiii 77li.  •».;.' 

dilictiLs 8:)2. xi5'; 

fia^'ilis 8;)2..s'.W 

I II id ii' IIS 8  !2,  836 

II  nil  am  i 8:i2,  830 

.Taiiira 82ii 

.riiiKiiiia 8."p.i.  884 

•Iiipilcria 8.84 

K.llia 783 

siilioiliiciilaii^ 77.'"' 

Kcllii'lla  iiiiida 77!) 

>p 778 

Kclliillida  778 

Killiupsis 770,  7*J 

clcvala 7*^4 

K.M.iicrlia 770.  822 

liicvi.s s:'/ 

};hu-iali» 821.822 

l.fda 770,  849.  8.".0. 852.  ^ '  (.  t>.''7,  •-77.  878.  884 

aniiiiiiiata 8.">0 

Ini.sliiaiia ■'''.'/ 

caudala 8,')4,  sr..', 

cii.spidata 8.'i4 

(•\l)ansM 871 

tinviatili.H 8'>4 

.ji'llVcy  si 80ii 

lata 8r.ll 

Ii'iiliciila 8lii; 

liii'ida 801 

liicssai  It'll  si.s 8."'! 

ohcsa 8lil.  ^r.:; 

pcriiula 8.')4,  ^.".■ 

jioitlaiidica  8.")7 

rn.strala 8.'i4 

mili('i|iiilati-iii 871 

tciiiiisiiliiila  854 

Lcdella 770,  S5:i,  884 

1  (iiitiiiis  8."i0 

Cdiil'usa 850 

ino]iiiiata  8."0 

iiiessaiM'ii.'*!'* 8.")5,  S.'i', 

\  :iv.  .-nlilr\  i.s ',.':/; 

niriilr;!'  8,"),"> 

p.iiva .S.'7 

jM'iallini.s >;.",.'i 

pridata 850 

rrctidorsat.i  .   850 

Kt'intMi 8,'>t),  857 

Hiiuiiiula 855 

Holidiila 850 

ultima 850 

I.odida- Sis.  851,  854,  884 

I.<(liiia' 8.51,  8.54.  884 

Lt'ptaxiiiii.s  770,7.'"; 

Hi  ill  Mill.- 790,  7.'.  7 

l.clilonida' 770 

Leplopt'cttMi.    (Si.'iihi'  I'fiirii) ^.?; 

iiiiiiiiiliiiiii  is 831 

I.,iMia'a  subdvaii 824 

Mniatiila 770 

conl'iisii H25 

liyaliiiii s'/'i 

iiodiili'si j.\'4 

ro.'iuliu'is SSJ 


ifiicoi 


oi: 

CI 

c\ 
<lii 
oil 
I'a 

.SMI 

Jrallflina-.. 
.Martisiii  .. 
.Marte.siciiii. 
( 
^le^'ayoldia 

Microyoldia 

SIoiitaLiita.. 


1'^ 
778 

3,  r« 

0.  822 

,s';'i 

1.822 

'K.  «84 
8')ii 
.s,-( 

54.  •^■••' 

8.-.4 
871 
8-.  4 
80ti 

8lii'. 

8r>'i 

8i;i.8l"! 
S.')4.  V- - 

.     8:)7 
.     8:.4 

.       871 

8r)4 

,s5,^,  884 

l-.'lli 
8.'<'i 

8,'):. 
8r>i'> 

8."i0 

I  grit),  8ri7 

8.').'. 

8r'i; 
8.'ir. 

I  8.-1 1,881 
I  >^-A.  884 

79ti,  .'■"" 
771t 

831 
824 

770 
82.-1 
S?' 
f.'J 
S2J 


nm.  u:ii>. 


DEEP-WATER  MOLLrsCA-VEIUlI LI.  ASH  III  s/l. 


S!)9 


Limutiila  .suliovatn. 
Liniidif 


I'a;:c. 

, .       824 
.       82:i 


LilM(il).'<iilir 84") 

Liiuop.si^i 776,851 

aflini.s 1  /'■' 

aiiiita Kti: 

vnr.  pliinii 84i"i 

var.  .' 817 

iiiinnta vl' 

Iiliiiia sii; 

lirofuiulifdla ^  /r 

HP 84<i 

sulcata M  ■ 

Lir<i](e('liii 82'.t 

Lis.siichlarays 8;!;i 

i-xcisa 8:i:i 

Li.s-opfL'liii.     ISieatio  I'ectiiii ^.J" 

hvaliuMs 81(1 

l.yiiii.sia 7711 

ai'fno.sa 81  It 

graiinlircrn ■■>;') 

L.VdiHida' 818 

L,\  onsirllu 7Tl"i 

inrdatii ^/^ 

subqiiadiata ^17 

Lyoii.siillida' 817 

Lyrodesina 8.-)l 

LyiddcsinatiiiM' S.'il 

Lyiopi'ctiii.     ( .*>■('<'  uIkii  I'l'cteii) s'.'.'' 

nddiisiis 8^9 

Mai  oiiia 770 

iiillata r,"s 

Maci'dililaMiy.-^ >i''i 

latissiiiia 8:i;t 

Macriidiiii 842 

a.spcriila 842 

I)i'iit'iindi('ola 844 

sagrinata S12 

Mallftia 776,  850,  S:3, 878, 88ii.  885 

abj-.-isoruni - 874.  s:', 

ajiatUida 88.1 

amabilis 880 

anoiiana 874 

bfUardii 874 

cliileii.si.s 8711,  874 

ciineata 874. 883 

cytbtTfa HiH^ 

(lunkfii 874 

obtu.sa S:i 

pallida 874 

]K)lita 874,  vri; 

miiitliii 8ci3 

Mallet ina' 851,  873.  885 

M  ait.sia 777 

Marte.sicUa 776,  ,T," 

frajrilis ",' 

Mt'ltayoldia ST;/,  884 

tliracia'fonnis 8.51),  860 

Microycildia 776,  V',V),  884 

rogiilaris s(,y) 

Moul acuta 77C,  783 

bidontata 77^1.  784 

var,  tVa^jilis 7s(' 

var.  toimi« 77H 

bi)\viiiani 78» 

casta 7<t 


83,  784 
783 

7-«; 


TaL'. 

Miiiitacuta  riiiicata 

il.vala 

Irniii;iii().'-a 

ovala 

Mtriatiila ;^() 

triciui'tra ^;^} 

tumid  Ilia ">/ 

Mya  liidfiitala 770 

M yoijeia 770.  71)8 

K'S''i"<a "ill 

limaliila nl> 

paucistriata 809 

liri'liosa ,s;/ 

iiii;i?iii8,i sll 

iiiidata 7il^ 

Mytilida' 847 

Xeaia  a  ret  ii;i 8U3 

costata 810 

gi;;aiiiia 811 

jllacialis goo 

laiiiclli..-*a 799 

liiiialula 812 

iiiullii  osiata 808 

var.  ciirta 808 

()l)e.'<a  8(»4,  805 

paiici.striata 809 

l)i'Ilii(ida 8114, S05 

prrriLStrata h09 

rost  rata 811O 

riii;inusa 811 

»\< 80.5 

siiblorlii 8116 

uiidata 708 

Nfilii s,-,'.  H85 

ciiiiiiimii 877 

KDliiura 877 

XeiliiiU'lla , 776.  ^^^,  885 

corpuli-iita 877.  878 

l>iisici 878 

(iuadrani;ulaiis h7$ 

SLTicea 878 

stibovata sTU 

Nuciiiella 85| 

Xui'iila 77ti.  !H9.  85o,  s:.i,  884 

h.-,4 

K-,.3 

866 

851 

853 

S53 


caiicc'llata 
):raiiuln>a 
lent  ic  ula  .. 


II  mil' us 

|icriiauil)U(('ii.-<i.s 

prnxinia,  vai'.  ovala 

subnvala s;? 

tenuis 853 

tri^diia   853 

verrillii sri3 

Nuculaiia 851,854 

Nueulaiiicla- 85-1 

Nueiilidie V/V851.884 

Xuculiiia s.:j,  884 

adaiiisi 851 

lalabra 851 

niili,"ris 851 


iiiuiiita  . 
o\aUs  .. 
Huleata. 


Nuciiliiia' 
Nuculites 


851 
K51 
831 

834 
850 


,1  t 


!ii 


-Ir 


J 


90<» 


i'iK*tvEi:i)ixt;s  or  Tin:  witiosm.  museum. 


V'lL.  XX. 


N".  !l;;9. 


Oiiportfll fi:i;! 

(»ii|if('t(n  iiitiiiHliiiiis 8:t:i 

Ortliiiviildiu >sv'.''.  8M5 

sr«|iiii:i (<r>!l 

stilciKiidcs 851) 

I'alH  iimild S4!l,  H5ii,  H'll 

loiislrirtii S'lU 

I  liana M.lu 

I'aUii>liiMi.     (Sii'iiUo  I'cctriii 82H,  x.','/,  tiH3 

-tiiatiiiii ^'Si 

test  if si:;i 

vitit'Min 8'J'.I 

Tall i mil.     iSicalno  I'cctcii) ,S',',".  S'J'J 

plica 827 

raiiilnia 82 1 .  K2J 

rostrata H\1'2 

Paii>lciiic!a' AH) 

I'ara;iiiiMiiiiii s.l: 

ilalli 8:!2 

I*ar\aiMiissiiiiii Ki3 

raiiicllatiini 833 

r<  !■(  Iiicilia  L'lamilil'cra SIO 

•siiljciuadrata 817 

IVi  ten s.v;,  (S27,83;i 

liiiiciljcti  (<'lilaiii.\s)  s;y4 

cliiitoiiius  (I'lacoiit'ctcn)   831,838 

ripMtillatU.s  ((Jlilaiii\  S) >;W 

dilectiistHvalopt'ctfii) 832.  s.:i; 

f.VDticiiiii  (I'siuilaiiMi.sinrii) «28 

riiie.stiatus  ( I'lippoaiiiiisiiiHi) 821) 

tVav:iliH  (IlyaldpeclLMi) 832,  AJ'j' 

lL'riiiilaii<li(!a  (('aiiiptciiii  rt(s) S,37 

liiiskyiisi  (I'ri(piaiinisiiiiii) 83!),  840 

var.  pii.Hlulo.'iu.s 83',l 

livaliiiiis  (  I,i.s8oj)i'(tL'ii) 830 

liiilirilVr  (Cycldpectcii) 832,839  XiO 

iiiii-ciui.sciilptiis  (I'ropi'aiiiii.siuin)  ...       82!) 

iriailiaiis  (.K(|uipii'teii) 830 

isliiiiilirus  (Clilaiiiys)    t<27.  834 

kiTiiiadi-censis  (Cyclopt'clen) 841 

k'li.-i  (Caiiiptonoctcs) 828 

lviitali'u.-<  (Cyt'lDpcctcii) S3ii 

iiiiixiiiiiis 826 

iiiomitinii'rin  (Leptopeotoii) 831 

nanus  (Cycl<)pei'l<ii) s.:; 

nmlosus  (Lyropcctcn) 82!) 

opi-rciilari.s  (.i:i|iiiprct(;ii) i^'M 

lilciironcc.les  (Anmsiuni) 82ti 

plica  (Pallimn) 827 

piulicus  (Hyaliipi'ctcii) 832,836 

pustulo.sus  (Cyclopcctcn) 832.  s'.'.' 

striatu.i  (Cainptoiici  ti's) 828 

siiliiinlirit'cr  ((Jy('l(ipcct(>n) ''  W 

testif  (Palliiilnin) 828.829 

tliala.s.siniis  (Prnpeainii.iitini) 841 

tiiiriuus  ((.'aniiitont'(tt's) 828 

luiilatiis  (ftyalopecton)    832,  836 

variu.s  (( 'lilaniyB) 834 

vitrcMis  (Pallioluui) 829 

Vat  inclla S-SO 

sigglici 830 

Peotiniila- .W,),  831- 

Pepliim «13 

intk'xnni 833 

Periploiua - 776 


Page. 

I'oriplonia  allini- S,'J 

iiniliilala S.'.; 

Pei'lploniiilic 822 

I'tliiciilida' 77.'< 

PhascohiH 851.  8.-4 

oval  MS 8t;8.  ."t 

I'lioladida' 777 

I'iaccppcclcii.     iSif  (ihii   Pectin  I s.  / 

I  lint<iniii.>< ^3 1.8.38 

I'lcunidim 8.'1 

I'U'iiionci  tia 8Jii 

Poroniya 77'i 

((Jfloin> a)  dciiiiiata ^l.") 

ILiraniilata 81.'i 

niicrciddiiln .'•13 

.sulilivis i<13 

var.  mien  idem  I  a ^;.) 

Piiromyida- t^l3 

I'nitlaudia ^:.:.xM.s^i 

;ni  tica ^.■.7 

lenlicula Mil) 

lileida S>'C 

J'lopeaniu.siiiiii.    O'ef  also  IVcten) •-,','',  ^3  I 

iVncstiatiiiu 82!) 

Iio.sky  n.'-i t^'M 

ineiiuiseiilpla >2'.l 

lliala.s.siniini ^11 

I'seiiilaniu.-inni.    (.VfnJ.w  Peeteni  ...    ->.'->.  .■>29.  ."ii:! 

e\(iticMiii MJ8 

iiiiliriler M'l 

leplaleii.i 6?,:i 

thalansinii.s 811 

Pseiidomalletia  STI 

Sarept!! 851,t>.-.'j 

Mpeeiosa 851.  I"N'i 

Sareptiiia' 8'1 

.Satiiiiiia 877.8''< 

Scapliarea 8)2 

Schi/.othariis Tvi 

grand  i.-i >'i 

Senu'lida' "' 

Silienla 850.851  ,--5 

fragili.-* ■■'' 

Soleniya ~'''  -'i 

giaiidis 

SoleniiiiiN  i(he 

SyncyeldMema ■•'-.  *'''' 

Telliniya  liidentala ''■' 

elevata ""t 

t'erriifriniisa 7.'>1.  >•>' 

Telliiiida- 778 

Tliiaeia  iiitida 'IS 

Tinilaria 776, 849,  8.".o,  8.11, 8fi«.  S.ix.  8>.i 

aciimla ■'^^' 

anialiilis m'.>"l 

aiala *""'•  '^'•' 

eallistiforinis "''' 

cuneata '*"'l  '■^■' 

cy t lieiea 8>U.  .H"! 

lata '•'^1—'- 

siiiitliii *'^' 

scilida '■"' 

veneriforniis ^"' 

virens '"''  , 

Tlndarinii'  '«'| 


\ 


'•r'i'ordia 


Vei|,eor,li,i,~ 
'  ■*''  ')/n\,i 

\..ia...  :..;;■ 
i""''iia . . .  y,^ 

'I'ly-NNie 
aicti,.,,  . 

'■^liiiiisa 
'riyida. 

''.^l'erl.0 
.ielt'/vysi. 
'""atiiJa 
'"'■itla..., 

""••<'<aiicn 
'ii.\alis  ... 

"lie.SH 

<>l»tll.s;i  .. 

'■t'^'l||,.,,.J3.. 


^<'.  lI.'fD. 


_/-«7..,r,„.,v,„o„,,„. 


TiixlHPioi.Ni^ 

'  '|;;'"iiii(iic 

''"i.'iilii,i(li,. .    

\"ti,.or,iin  ;:;;;,;;;;;•;;;;■•• 
,.  "'■■I'iiiii/-,.,.., 

^.'''"'•->n(i,i„, ■' 

^  ' "^i' 'iiiiva  

\ola..    

'"'.» NMieold  ... 

'"'••■flea ' 

'xi'iiiisa 

'riyi,!,,         ■"■ 

''.\ /"Tliore.., 

.i''"'n'y.si 

""•"tula 

Iiicida 

""•xsaiipiisis,  v,i,'. 

"'.yalis 

olic.sa 

<>l)tll.Sii 

'•«Wiilaria......' 


•  •      SH.'t 

■■     sr.i 

•  Sir, 

■       SI/; 
816 
H17 
Sl'« 
8Si 

■  ■     sm 

"'-'.  873  j 
8''8.  ,><;:> 

■■■       858  ( 
•  89S,  S70  I 

••      8.18 

■■       '<J«  f 

••      S5H  I 

•    su  : 

■      860  I 


'-^J^lUilU  AX,, 


■■^crirca 


licsrr. 


dOl 


V<)Mi,.]l;| 


var.  striolar,,."" 
'"•''I'lilatcra.. 


■v.  839,(^7^ 


.  871 
807. 


<'iirta 

'""•^iiiiiljsi    .__ 

'■'^Iiiiiisa  

'•■a  terna.. '.".'." 

'■''Villa.....'.'" 

liovlci 

'■"loiis, „•,.„;,      

'■'"lafu _■ 

iris 

.lem-i-VNi...         

'eiiti<ii]a.. '.'."' 

,     .,         *»r.  ainl.ii;, 
iiiciiia 

""■"ii.sciila 

P.icliia 

N"l>aij-„|,„',"'_ 

8ubL-(iuiIatera". 


T'aijo. 
838 

879 

878 

:,„ 871 

"''•''•<9v'.7.883 
•••  '^"1.  v(,v,  ^,(3 

8(il,s7^ 

8»i|.s7^ 

86|,.,v;7 

801.  v;j 

8B1 

m.w.) 

8(il,  v/;.; 

8fl),K(!J 

8(il.sy;/; 

801 

88l,sv,y. 

■•■•  W;,„g5 
••■■  80 1.  v,v; 
—  8K1,  v/;,'; 

■••■    801,  9,;,; 

•••  8«l,v;7 


'    'l^i 


Hi 
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1 


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0.  S.   NATIONAL  MUSEUM 


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FciR  EXPLANATION  OF  PLATE   SEE  PAfjE  888. 


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For  exp.anation  of  flate  see  page  888. 


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For  explanation  of  plate  see  page   889. 


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